Have not installed into a rockwood, but the HD sat it self can be installed a few ways, single cable from the sat dish to the receiver (one tv). Single cable to a multiplxer then to the receivers, most campers will need to be wired to get to the 2nd tv. If you get a sat dish with multiple feeds you can go direct to multiple receivers, (i do this and use a flat cable to pass through a window for the second receiver that way i did not have to rewire the camper, but set takes a little longer on the second tv, however i also move that tv from inside to outside at times and have no wiring issue that way. a good reference is installer oassis InstallerOasis.com
they have a good forum and actually sell the correct parts to do the job.