Sounds like it is your first time doing Sat tv while RVing, I always suggest setting it up at home first to get some familiarity with the process. It becomes easier with practice, plus you could verify if your Dish 500 will work with your Hopper as you intend to use it.
We've been setting up our own sat dish for both Directv and Dish for over a dozen years and it has become second nature for us. Good luck, one of the major reasons we always set up our satellite dish is to view our favorite sports no matter where we park.