We have had Dish for many years both at home and in the RV. Originally had the RV on the home plan for an extra $7/mo. Never a problem getting Dish to change our locals to nearest city when traveling. That messed up the locals at home. But no one there so didn't matter. But DD moved back in with us. And that messed with her TV watching. So changed the RV to the monthly plan where I only pay for the months I actually use it. Now we can get locals when traveling in the RV and DD can still have her home locals while we are gone.
Getting locals changed to nearest city while on the road has never been s problem with either plan.