We were there the first week of Sept, it's warm there then. Not a lot of places inside the park to pull over with a big motorhome so your toad will be great and parking gets filled up early in the day making even less places to park, so start your day early. We rode Zion and Bryce on the Harley so we were able to stop just about anywhere. Awesome country and if you are into hiking, Zion and Bryce will be what you want to cross off your bucket list. We stayed at Zion River RV park and used it as a home base riding the Harley to a new point of interest for the day, really really nice park and the people working there. If your going during warmer weather time of year, this RV park has the river running along it. We would spend the afternoon's after a long ride cooling off with cocktails in hand sitting in the river. You can bring chairs and sit in its shallow pools and also bring tubes to float in, set up a day camp on the beach, what ever. The parks swimming pool had so many kids in it for us to be able to relax, plus no alcohol in the pool area , plus rivers are so much more appealing then a park pool. Kolob Reservoir is North of Virgin on a county road, it a small lake that is a great day trip, take your car if for the day. It's higher in elevation, green forest, green grass, escape the crowds and heat here, fish, water is clean and you can rent kayaks, swim at the lake. Next time we are going to camp there for a couple days, you can camp right on the shoreline, that's our plan next visit. We were there during Labor Day holiday and the lake was not crowded at all, its a out of the way spot with the parks getting the crowds. Byrce is pretty high up so bring light rain gear, even in summer, we rode into Byrce with clouds that later turned into rain then snow the higher we got, yes in Sept. Then when we headed back to Zion and dropped down in elevation, it got hot again, so plan ahead for any weather up in Bryce,,,gregg