I too, am Pooh-sized.
And, I was very worried about our trip this past April to WDW. It came about rather quickly, and immediately I was worried about if I would 'fit' in. I only had four months to lose that 100 lbs!
I found the WDW At-large reports on the the All Ears website, which helped ease my tensions. I made some notes about some of the rides where people suggested which seat to sit in, which rides to avoid (very few!) and was 'prepared' to go. I was not disappointed once. Overall, MK (being one of the older parks) had the turn-stiles that were a little tighter than the rest. I found that just looking eye-to-eye at the CM when I was getting ready to be seated in a ride with a questionable look like 'help me here!' was more than enough for them to recognize my concern and place me accordingly.
The suggestions to 'always pull the seatbelt all the way out' and 'turn sideways on the turn-stiles' and 'sit by yourself on Kali River Rapids' (which I didn't and everything was still ok!) and the suggestions that the At-Large reports give as far as sitting on the end, or in the back, or in the front of particular rides proved invaluable to me. Also comments where they said to perhaps sit with your child, instead of another adult. I can't remember which ride that was now, but followign those suggestions made for a perfect vacation.
I traveled with a male friend and his kids and my son, and honestly, I don't think he had a clue why I chose certain seats to sit in. My trip to WDW was wonderful, and the only bad parts were when I 'worried' too much.
I've read bdklein's comments, and at first I was insulted, but the more I read, and the more I thought about it - in this case and in many others - people who don't have a problem, just don't understand.
For those who don't struggle with weight, it seems very obvious how you should lose weight, and keep it off. Eat less and exercise. It's very black and white to those that don't struggle, but for those of us who do, or at least for me, it's a very deep emotional issue, one that I don't understand. It should be easy - but it's not.
Just as people need to be respectful of Pooh-sized people, I need to accept the fact that some people are never going to be accepting of me for how I am. Life isn't fair.