Direct tv has an RF Remote that transmits a radio frequency that I have found very effective from anywhere inside the RV as well as from the outside TV location. The direct tv receiver must accept a small 6" antenna via the RF connector (looks like a coax connection) on the back of the receiver. The remote is programmed to the specific receiver using the receiver ID, thus eliminating the chance of affecting other direct tv receivers. Perfect for the outside TV hooked to an inside direct tv receiver. Also great for changing the front receiver from the bedroom location. Best $30 I have spent in a while. The remote can be found on at
www.directv.com and then searching for the remotes.
Please be aware that not all receivers have the RF remote capability and must have the input on the back panel.