We take ours camping all the time, Actualy have a dual LNB direct TV Dish, that I have on a tripod. I take two Receivers from the house, (dishnetwork)one for Kids bunk room. I put a dual connector on outside and modified existing hookups inside. I just try to get 119, most of stuff is there. I tried a 500 but it's a PITA try to hit both birds with all the trees in the way. Hitting 119 is still a challenge and sometimes not possible in the brush, some times it will take an hour, other times, 30 seconds or less.
Since we use receivers we already pay for, there is no extra charge.
My Sis went from cable to Dish just for that purpose. They are now snowbirds for 3 months and are loving their dish on the road from Texas.