[rheavn]

I'll add to Clarke's excellent thoughts. When I call I always use the term that I am as big as a tour bus. I also ask if the trees are trimmed to 15 foot high. Those two things usually give them a visual. I still get to the park and have disappointments, but I let them know I called ahead and who I talked to. I also don't drive into a park without walking to the site first. Red flags are when they tell you, "No one has ever complained" and "We get big rigs all the time". We know what parks work for us and we patronize them. So far this has worked for me.