I tried a wireless hitching camera, but there was some interference, so the image was so-so. Then it dawned on me that I already had a GoPro with wifi, so I linked it to my phone & it worked great. I use a RAM mount, either the suction cup or the "tough claw" to anchor the camera to a smooth surface (counter top or fridge) or a cabinet handle. Power can be supplied via the 12V outlet near the TV.
TH: 2014 Eclipse Stellar 27DBLG, grey, Abyss pkg, 10K GVWR, ordered 6/1/13, delivered 12/14/13
TV: '04 Suburban 2500 LT, 8.1L, 3.73, 4x4, 10K tow rating, Blue Ox 14K hitch... aspiring to replace with a diesel 1-ton
Toys: '13 F800GS, '09 KLX250s, '05 DR200se