Wherever your bill or account address is your home area.
If you call you must use the term" Service Location" has changed.
Not your billing location.
Many times those Customer Service level 1 people have no idea what you are talking about.
Sometime you have to tell them you are in a RV and travelling around the country.
When your service area zip code/address of RV park is given you will get the closest big cities local channels. Unless you subscribed to the service that give you LA, NY or Dallas for more $ per month. It also depends on your location in the US.
Have fun full timing.
My biggest worry doing that is I die where will they send my body.....