My prep kit included the dish (non HD), coax and mounting bracket as well as a compass.
I didn't use anything but the coax. I had an HD Slimline dish and just needed the longer coax because I had to mount a long way away to get around a tree.
One thing I did was to contact Jayco direct and they sent me a schematic of the audio/video cables and what runs from each component. This was necessary so I could send my directv signal from the satellite input on the outside of the 5'er up to the front TV as well as the one in the rear. My dealer didn't have this drawing, but Jayco sent it to me via email in .pdf format.
2006 GMC 2500HD CCSB 4x4 Duramax/Allison, Titan 52 gallon fuel tank, Prodigy Controller, B&W Companion Hitch
2010 Jayco Designer 35RLTS, Cummins/Onan RV QG 5500 EVAP, Progressive Industries EMS-PT50C, TST Systems 507 TPMS, RV Flex Armor Roof