On edit: I see Ed beat me to it, so I'll leave my post as is and just add an "X2" for Ed's post. ;)
We change our Dish service address as often as daily with no problems when traveling. There is no extra charge for taking your at home receiver with you in your RV, and many part-time RV'ers do exactly that. We've found that the Dish online chat system works best for us when making the changes, and we use a pre-written script with the new address that we just copy and paste into the chat window. Make sure they ONLY change your service address, and NOT your billing address. You can check that using your MYDish account and correct it if necessary.