We went in 1983, when I was 7, my brothers were 11 and 13. We stayed at the Contemporary, which along with the Poly and Ft. Wilderness were the only Disney places to stay! Imagine, only two Disney hotels to choose from! It was a huge trip, we actually flew, the last two times my family went (without me, I stayed with grandma since I was so young on the last trips) they had taken two days to drive down from IL, and two days to drive back. We were able to fly because Eastern Airlines was struggleing and had discounted both the tickets and the WDW package to the point where it was too good a deal to pass up, even for my cheap-skate parents!
We went in the fall, I'd say it was sometime in early November. We had soooo much fun! Truely, the best memories of my childhood were there! The first thing I remember was getting to the room and looking out the window (not much to see, garden view since we were in one of the wings) and asking my dad if the tv got the Disney channel (this was back when DC was a premium channel like HBO was!). We headed straight for the parks, even though it was only open a few more hours. Splash wasn't open yet, but we rode BTMRR. Later in the week, my dad would take the boys on Space Mtn while mom and I rode rides in Fantasyland (mom wouldn't ride Space, and dad was nervous about all three kids being on a ride where he could be next to us to make sure we were okay, the year before my brother had tried to get off a roller coster at Six Flags when he decided he didn't like it!

Not wanting a repeat performance from me, I was baned from any big rides that he couldn't sit next me on). We also went to Epcot, and were one of the first (if not THE first) group to see the Universe of Engergy (dinosaurs) ride. The wanted a test audience, and we happened to be walking by and they waved us over "How would you like to see the ride before it officialy opens?" Heck yeah! I remember the fog they pumped in smelled really funny (I think it was supposed to make it smell like a swamp).
I also remember my first encounter with Mickey. This was back when characters were sent randomly out into the park, so comming across him was a BIG deal. I didn't have an autograph book, so I just shook his hand!
And the one day it was warm enough to swim, we went to River Country. To this day, I'm still mad at my mom, she wouldn't let me go down any of the water slides because I wasn't a good swimer (I was, she just didn't think so!) and she didn't think Dad could watch me AND the boys at the same time (ummm, gee mom, there WERE lifeguards on duty!!!!) so I had to stick to the baby stuff!
Yup, great trip. I think 7 was the perfect age to go, I was young enought to "believe" but was tall enough and brave enough to tackle all the big rides. Best of both worlds!