We loved the Segway tour we did in February! DH is already saying he wants to do it again. Well worth the money.
When you go to Epcot, we checked in at the guest relations building that is just beyond Spaceship Earth and to the left.
I found the most difficult thing was getting on and off. The trainers were very good and reassuring.
I must confess I did have an almost oops...I panicked while still in the training room - I was going to hit one of the cones...and my initial reaction was to step off the HT...not the thing to do when you are still moving. The trainer came over and just said to trust the Segway, think stop, don't take your feet off.
After that I was fine. I had always heard that if you think go it will go, if you think stop, it will stop...it really does follow your lead.
When we were in WS, I did fine, though I was usually the last one. Didn't mind though, as it gave me more time to enjoy the views. We had about 3 extra cms on our tour of WS that brought up the rear with me. We also had our trainer, and the tour guide.
We had a couple of teens on our tour and I think they were pushing their HT to the limit. At one point on the way back at the end of the tour, we were riding single file. World Showcase was open at this point, as we did the 9:30 tour. One of the teens ahead of me, took both hands off the HT and before I could even do my motherly "Don't do that", our trainer John, shouted from behind me, "Get your hands on that Segway!"
Sorry I can't offer any information on rain.
Have a great time!
Pam