I have a 25' front bed queen. I installed the signal booster at the top of the front curb side wing window, which gives the signal booster line of sight contact with the pick up cab. The window glass has a plastic moulding which is secured by screws--attached the signal booster using one of the existing screws.
On my trailer the tool compartment is on the curb side under the queen bed. I bought a rocker switch with an 8' prewired lead on Amazon for a few bucks, and robbed power from the 12 volt
supply to the tool compartment light.
I installed the switch on the tool compartment wall to the right and above the tool compartment door--an out of the way position where the switch won't get bumped accidentally.
When I hitch up I turn on the switch. The signal booster has a bright green LED light to indicate power on, which is visible from the outside.
While I had hoped locating the switch in the compartment where I store my hitch accessories would make things easy, I see that blinkety blank LED light when I crawl into bed.
Maybe you'll have better luck remembering to turn the switch off upon arriving at your destination!!
Otherwise, the signal booster works great and is fully protected from the weather. Its the operator that's the problem.