Dish Network vs Direct TV–do either offer satellite TV service while away from home?

I spend a lot of time outside while camping out, but I like to keep up on the news and relax in the evening with my favorite movies and TV shows. I am looking for a system that will allow ;me to enjoy my wanderings AND enjoy my entertainment also. I have an RV that my family travels in extensively and camps for weeks on end at many different remote spots. Can I have satellite TV while I am camping? In researching Dish Network vs Direct TV, I have been unable to find this information. If such a system is available, I would like to have the details about how it works and the cost.