After dabbling with off-the-shelf wireless cams that weren't worth the box they came in, I bought a ChiCom 5W transmitter/receiver off ebay, and hooked it up to a license plate camera on the trailer.
Had a great picture but, there were a few problems:
- if I forgot to switch it off, 5W is a pretty good parasitic drain.
- if I forgot to switch it off, 5W is also a pretty big EMF bomb, right at the head of the queen bed.
- It would randomly drop out on the freeway... usually when I was near big rigs
which leads me to think
- It was probably illegal, AFA bandwidth and broadcast power
Decided to install an RVS wired system. Very happy with it. I blogged about it here