So what I'm hearing is that
1 - I would have to own all the receivers (currently have a leased Hopper 3)
2 - Close the existing account, get a completely new account setup by a retailer that specializes in RV (this means all my EHD content is inaccesible because of the account-specific encryption keys)
1 is additional expense, 2 is a dealbreaker as I am not ready to lose a large amount of archived content.
Probably simpler just to chat with dish support whenever I'm traveling (or "traveling") and need different locals.
Thanks for all the input guys, I learned a lot!