I don't see a reason you wouldn't be able to do so, we have been back and forth with both Sat TV providers for decades to obtain promotional pricing and always have several receivers at home while adding a receiver to our account for use while RVing around the country, Dish seems more RV friendly than Directv.
Customer service from either is hit or miss, although while RVing Dish is much easier to work with via Dish Chat on our smartphone. Can easily modify local channels wherever we travel in a couple of minutes. If you set up your own sat antenna as we do, the process for Directv is a bit easier than for Dish.