We just got back late yesterday evening - We were in WDW from 6/13 to 6/20. Last year, we were there in May (the week before Memorial Day), and, honestly, my DH & I both agreed that the only time we really noticed an increase in crowds this past week was in the transportation arenas - waiting for a bus or a boat.
We were in the following parks on the following days:
Tues, 6/13 - Arrival & MK - Quite comfortable temperature-wise due to Alberto...

Rode Buzz & Haunted Mansion & IaSW & TTA; we ate dinner at LTT & were seated 15 minutes prior to our ADR time. We had front row seats on Main Street in front of the castle for Spectro & Wishes - got there about 45 minutes before Spectro started
Wed, 6/14 - MGM - We got tons done - way more than last May & the kids saw Mr. & Mrs. Incredible & Frozone & DH rode RNR. The way the shows are staggered it's hard to see all the shows in 1 day, so we didn't see the Muppets show, the Playhouse Disney show, the Stunt Car show, or the Indiana Jones show; however, our kids don't really know the Muppets characters & are really getting too old for Playhouse Disney. We saw The Little Mermaid & Beauty & the Beast shows. We ate lunch about 11:15 am at Toy Story Pizza Planet, and, maybe since it was a little early for lunch, we thought the restaurant was WAY less crowded than last May. After a short swim at our resort, we returned to MGM at 4:30 pm for the parade & had front row seats on the curb. However, Fantasmic did get crowded a lot quicker than I had anticipated. We had a FDP at Mama Melrose's & went to the reserved seating section at 8:30 pm & had a hard time finding seats.
Thurs, 6/15 - MK - did most of Fantasyland (including Dumbo), Buzz, all of Adventureland (fastpassed The Jungle Cruise & rode Magic Carpets w/ about a 5 minute wait) & then rode both Splash & Thunder Mountains before we left for a short afternoon break; returned for the evening & had great places for Wishes in Tomorrowland. We ate lunch at Crystal Palace & dinner at Columbia Harbour House.
Fri, 6/16 - according to the UOG, this was a "best day" for EPCOT, & we both thought the UOG was spot on - the crowds felt "low" all day - we fastpassed Soarin' & The Land Ride & rode Test Track (in about a 30 minute line) stand-by & Spaceship Earth w/ no waiting. We shouldn't have left Epcot for our afternoon break (I was getting hot), but I thought we'd be back in Future World later during our stay. Lunch was at Garden Grill. We returned in the evening & rode the last "Ellen's Energy Ride" of the day & had dinner at the counter service in France & again experienced relatively light crowds in the WS where we rode El Rio De Tiempo & Maelstrom w/ no waiting. We then rode the monorail back to MK so the kids could ride Haunted Mansion & had no wait there either - but MK was crowded since we got there right at the time for Spectro.
Sat, 6/17 - MK in the morning, CRT for lunch, & then our resort in the afternoon/evening - It was hot, but we rode several rides in Fantasyland & rode Goofy's Barnstormer in ToonTown twice in a row & fastpassed Space Mountain before we we went back to our resort to rent Sea Raycers & swim
Sun, 6/18 - AK/EPCOT - according to the UOG, this was a "best day" for AK, but I thought it felt very crowded; DH, however, thought it was less crowded than last year - but, we did NOT ride EE, unfortunately. We rode Dinosaur & the "Dumbo" Dinosaur rides w/ no wait, fastpassed Kali River Rapids, & rode Safari in a 30-minute stand-by (which was really about 20 minutes). The kids played in Dinoland & we also rode the train to Rafiki Planet Watch. We had an 8:30 am ADR for Donald's Breakfastasauras, & we had to wait about 15 minutes past our ADR time before we were seated. Lunch was at Flame Tree, and we were able to get a table by the water. We went back into Epcot for Illuminations &, again, thought the crowd was "low" - had no problem getting an excellent viewing spot for Illuminations after our dinner at San Angel Inn (waited an extra 30 minutes for a table by the water/pryamid) & we were on the first boat out the Int'l Gateway after the show
Mon, 6/19 - MK (supposed to go to EPCOT too, but we slept in too late - so I never made it back to ride Soarin' again or do Turtle Talk) - we fastpassed Thunder Mountain & Mickey's Philharmagic & Buzz later in the evening. Lunch was at Tony's Town Square, & we were seated 20 minutes before our ADR time. Dinner was at WCC, and, again, we were seated about 20 minutes before our ADR time.
In MK, we rode TTA several times (nice "break"), rode the train to get around the park, and saw CoP twice.
Tues, 6/20 - Departure & DTD - hot, but not very crowded (except for EoS - but isn't it always crowded?)
It was HOT - but not completely unbearable. Alberto cooled off Tues (6/13) & Wed (6/14), and it was cloudy on Sun (6/18). Evenings were pleasant, we thought. The hottest days were Thurs (6/15), Fri (6/16), Sat (6/17), & yesterday (6/20). The absolutely hottest was sitting on Main Street waiting for the afternoon parade on Mon (6/19)!!

Ay yi yi!!!

We enjoyed the brief rain showers & even thought Alberto on Tues (6/13) afternoon in the MK was kind of fun...
We fastpassed more than we did last year. And the only things I regret are that my DH didn't get to ride EE, and that we didn't get back to Epcot to ride Soarin' again or do Turtle Talk & the Nestle Cooking Class.
We had several character meals, & the kids only stood in line for characters for whom we either didn't already have their autos or w/ whom we weren't dining at a character meal - so they stood in line for Mr. & Mrs. Incredible, Frozone, Friar Tuck, Baloo, Captain Hook, Rafiki, & Brer Fox. We thought about standing in line to see Max, but it was always too hot & the lines were too long. We saw Aladdin at our
AAA Storytelling Experience.
I'll be doing a Trip Report & Dining Reviews later. But, all in all, we had a great trip! I'd go in June again, but, if we can go earlier in June next year, we probably will because, again, we did notice more crowds (as compared to last May) while waiting for boats & buses.