Yep, the only way to make satellite affordable is to have the same service at your house that you can also use in your RV.
We get a signal with our dish tailgater and 150' of RG6 cable 99.9% of the time, across the country. The only times we couldn't get any signal was when we were in a deep, narrow canyon.
At home we rarely lose signal with our HD dish. It has to be a HUGE storm, and even then it's only for a few minutes. Wind (which we have a lot of) never affects signal. I did put my dish on a weighted platform on the ground where it is protected by a fence, but can still see all the satellites.