For those that are new to sat TV...
Sat TV providers send a sat(s) in the air. These 'birds' receive transmissions from the provider and in turn send them back to earth. These signals are scrambled. To receive these signals you need a 'black box' called a receiver. Each receiver is identified by a card inserted into the box identifying who you are and what signals your subscription allows you to receive. These boxes are linked to your subscription address, usually your home address. Therefore, when you are at your stix n brix home you simply turn on the TV, the box and you can watch TV. Now, if you want to travel, you unplug the 'box', put it in your RV and hit the road. When you arrive at the CG hook up your remote dish, roof dish whatever, align it with the satellite and you're in business. Anyone left at the stix n brix house will not be able to receive satellite.
The only fly in the ointment is if you travel too far out of your 'home' city. Local channels follow a narrow spotbeam to allow local channels to remain local. Otherwise someone in SF might receive LA news which would be worthless. Anyway, these local spotbeams transmit local channels inside a narrow beam to the receiving dish. Once outside this spotbeam, your local channels disappear. You then have to use a roof OTA, (over the air) antenna for local channels.
Where the confusion comes into play is when you notify DTV you're in an RV. To be politically correct, you should have a separate account for your RV. ($15/month extra) However, since you're paying for the service and only using it at one location then you don't really need the RV account. If you full time, everything is different as you might want local television beamed to your location from a specific source. We like the West Coast TV so we subscribe to the West Coast feed and get the Los Angeles feed even if we're in Florida. To subscribe to DNS, you cannot have a subscription in a stix n brix house. FCC rules.
I hope this clears some stuff up for those that are not familiar with satellite TV. Pay for what you use, but IMO don't overpay for services you don't need....Dennis