We have dish, a trav'ler, a hopper and a joey for our RV.
What you get will completely depend on how cheap you want to go and how much effort you want to put into getting satellite service.
If you want to go cheap, get a manual dish and tripod for the service you want and take the receiver/s from the house. This will be the most work every time you travel.
If you want to go easy, get an automatic dish such as the Pathway X2, and a 211 receiver. This will be more expensive at the beginning but will save you time when you travel. (If you require HD you will want Dish rather than Direct.)