I have a Prodigy P2 and it's great. My first brake controller and trailer, so if I can use it so can you. It's easy to set and understand, shows the current brake force while engaging, and gives you any trouble codes as issues arise. It comes with a permanent bracket mount and another slide mount. The P3 has more features and things to display, but for just simple towing to/from campsites I'd say get the P2 and save the $50.
RVW has the best price I've seen.
TV: '15 Ram 6.4 Hemi CC 4x4
Old TT: '12 Rockwood Roo 19 (sold)
New TT: '14 CR Sunset Trail 290QB
WD: Equalizer 1200/12K
BC: Ram OEM