This is my experience
POFQ might be CHEAPER but.... I arrived at my Disney Port Orleans French Quarter resort on Dec 31st to check in I had reservation for a non-smoking King size room, so after getting checked in I go to the room to find two double beds so I figured they made a mistake so I went to the lobby to get switched and they tell me they are sorry but that is all they have I had my reservations since March 5th, 2007 hello this is my wedding week I don't need anymore stress. So then we move all of the luggage to Riverside get to that room the manager told me the rooms would be the EXACT same THEY AREN'T it smelled like smoke (I am allergic to) and it looked very outdated and the bed was hard as a rock so I then went back to French Quarter bags moved a second time, back to the first room, was told I could come down to the office the next day and change to a king size room! No apologize or anything and did I mention they did the same thing to the guy beside me checking in! We went out for New Years Eve and the next morning I go to switch rooms and I am told I will need to sit in the lobby for five hours because I have to get out of the room to switch to the next room I would think they would have had the king size room ready because this is what the MANAGER told me the night before, NOPE they didn't finally we move to king room three hours later (move bags again) we go to leave to enjoy the parks and I check the door to make sure it is locked and it doesn't LOCK!!! Had to call maintenance and sit with the door until it was fixed another three hours of my day gone all they do is give me a fast pass and take one night off as a discount now remind you I am getting married the same week, and they don't say sorry either, I recommend pop century they had a nice resort cheaper and friendly people! I will not go back to Port Orleans again.
As far as the Grand being expensive it is so if you don't want to spend the money then, I would say Disney's Polynesian Resort, and if you want value then go to pop century it is nice for a value resort. If you do stay at a Disney Resort you will get Extra Magical Hours.
I love the summer time, I love hot weather nothing against it, but it really depends on what you plan to do if you plan on spending the whole day at the park then plan on being sweaty, sticky, maybe wet b/c FL does have rain showers about everyday oh and did I mention you will be packed onto buses or monorail with all of the other hot and tired people if you do leave at the end of the night when they close, but I have been in winter, spring and summer and I prefer winter I was also told the first week in Dec is good but I haven't been yet. You will have fun no matter what
I was also there on our Disneymoon with Mickey Ears, Shirts with Disney Bride and Groom and Buttons you can get from Guest Relations or the resort etc... except for the people who said congratulations nobody cared we had to wait in line just like everyone else, except on Mt. Everest the WDW employee gave us a free fast pass, we did character dining and got free deserts b/c it was our Disneymoon.
The Disney parades are wonderful but you have to get there early for a good seat, I would recommend two days at MK if at all possible (rides one day, shops and parades the next) whatever you do just have a good time and enjoy don't try to rush.
I googled best days to visit disney parks and found this and this is what I went by to plan which days to visit which parks.
Generally, the busiest times are at holiday times, summer, Christmas & Easter
MOST CROWDED TIME OF THE YEAR
Christmas through New Year's
EXTREMELY CROWDED
Easter Week (Before and After)
REALLY CROWDED
Fourth of July Week
CROWDED
Spring Break (first week of March until mid April)
Memorial Day Weekend
Summer Break (second week of June until second week of August)
President's Day until the end of February
A GOOD TIME TO GO
End of April
Early February
Labor Day Weekend
First two weeks of December
THE NEXT BEST TIME TO VISIT
Beginning of October until Thanksgiving
Week before Christmas
BEST TIME TO VISIT
January
September
What days are historically the busiest at the Parks?
Walt Disney World parks tend to be the busiest on the following days:
Magic Kingdom: Monday, Saturday & Sunday
Epcot: Wednesday & Friday
Disney-MGM Studios: Tuesday, Wednesday & Saturday
Animal Kingdom: Monday, Tuesday & Friday