I stayed across the street from the Hilton at Regal Sun Resort a couple years ago with my niece and had no problems with the buses on the WAY to the parks, but did not like them on the way back, I didn't like waiting so far away from the Disney resort bus stops and the buses on the way back seemed way less frequent. So coming back from the parks we took a bus to Port Orleans FQ or the Beach Club, then got a bus from there to Downtown Disney and walked over to our hotel. I know this sounds like a pain, but honestly it worked out pretty good for us...it was just me and my niece though, I didn't have to struggle on and off buses with a stroller or anything. Just a thought if you don't feel like waiting for the Hilton bus a night or two.
Another thing...the Hilton is the first stop for those buses, so you have to go around to all the other hotels when you get on there, but if you walk across the street to Regal Sun, they are the last stop before going to the parks, so if you get on at Regal Sun, you skip going to all the other DTD hotels. Also handy to know if you just miss a bus, you can catch it across the street.