The DIS boards were very helpful for us planning our first WDW trip, we also bought the unofficial WDW book.
We left December 12 and got home on December 24 at 3am, ouch. We had 8 actual park days, which was not enough to see everything but we had a blast. We spent 2.5 days at MK (xmas party evening in there), 2.5 days at Epcot, 2 half days at AK, and one full day at HS. If we had to do it over, we would have spent less time at MK and more time at AK and Epcot. I think we could have spent 3-4 days at Epcot and 2 full days at AK.
Touring is so different than at DL, attractions are spread out, and there are a lot fewer rides per park. There are quite a few shows and minor attractions to check out though. We did one morning EMH at MK on December 22-WOW WAS IT PACKED! Of course, it was xmas week. We did rope drop for all days and the first few hours were quite pleasant the first week, the week of xmas there were noticeably more people. Magic bands worked perfectly for everything, FP+ was ok, we did not try to add any more during the day but I was able to move some times around from my phone which was very convenient. Ride times were pretty spot on via the app as well.
I would agree with staying onsite, there are tons of options for most budgets. We knew this would likely be a one time trip for us because of the distance from the West coast, so we kind of went for it. We rented DVC points (we saved around 50% off rack rates) and stayed 3 nights at Saratoga Springs (wanted Poly or GFH-nothing available 10 months out) and 5 nights at the Animal Kingdom Lodge. Saratoga Springs was ok, kind of like renting a condo, we were very far from the lobby and center of activities, rooms were ok, we had a nice water/golf course view. AKL was amazing, a bit out by its own though. We were in the Kidani Village (Jambo House is the larger part of the resort). We were on the top floor (5) and had a savanna view-WOW. Feeding station right below, we saw animals all day long. We ate at all three restaurants onsite and all were amazing.
We did 8 signature restaurants (induing a Candlelight package) and most were quite good. We were actually a little underwhelmed by Be Our Guest (food was average at best-ambience was spectacular) and Biergarten (same-great atmosphere and beer!-food was ok). Best food we tried-Jiko. Best overall dining experience we had was at Narcosee's with water pageant and fireworks.
I planned the heck out of this trip and was glad I did-it really paid off.