We went with the TowMate RV remote set. It has been across the US and back one trip and working great. This unit does not have the builtin battery but plugs into a 12vdc adapter. Our towed has a 12 vdc outlet in the rear, drop the power cord behind the hatch - Subaru Forester. Not a single problem, the light bar is great and the magnets really strong.
Depending on your RV you may need load resistors to make the remote function properly. We have a View and tow module expects incandescent bulbs so I used a short 7 pin adapter from eTrailer with builtin load resistors which works great. The light bar is theft connected to my locked on kayak racks but if we stay anywhere in a questionable area I would pull the 7 pin remote and adapter. So far that has not been necessary.
The new vehicles are picky and I just set up the '18 Suby Forester with manual to tow a few months back. I highly recommend the TowMate RV light bar with remote transmitter to cutting into the vehicle wiring for diodes etc. About 5k miles with the Suby and the TowMate so relatively new but so far it is great.
Now when I say "not a single problem" that is after correcting factory wiring defect from WGO. I finally found the factory short jumper on the View had a bad ground wire - slight tug and it pulled right out. Yeah, back and forth on that one with blown fuses etc. but Mercedes was helpful since WGO said "not our problem, call Mercedes". I did that and Mercedes was great, got a tech on the line, described the issue and he said - "happens a lot", go out and pull gently on every wire to the 7 pin, especially ground wire. I did and the thing pulled right out, they missed it installing the pin on that ground, never seated. Temporary solution - another eTrailer part with a jumper. Spliced the loose ground into the jumper ground and new 7 pin. Can't do that on the factory OEM plug. Eventually I will pay WGO to make up a new factory jumper - maybe not.
Bill & Brenda + Mia
'18V24D, '13 TiffinBR32, Tiffin 34TGA, '11 Aspect 30C, 06V23H, '00 HHikerII 5W