I used the Mopar Harness. The under the dash connections were not fun, but it was a clean install. I suggest that you look up FL Steves and LT Dans posts. They will save you time and frustration, especially removing the glove box and speaker. I would go ahead and remove the front fender. I did and didn't have any issues with the various clips, the ones stayed on the Jeep and I just removed them and put them back on the fender. There is a forked shaped tool to remove the round buttons that your local auto parts store should have and that will probably keep you from damaging the buttons.
I will warn you that the 1 1/8 hole that Jeep calls for will not work. Most on the forum used 1 3/8. That may be ok, but all I had was a 1 1/2 metal hole saw and used that...worked great. Make sure you have some silicone clear sealant for the plug, small tube is just fine.
I spent the most time one the connections under the dash. Yes, I probably should have pulled the seat, but didn't. Once I got done my neighbor had a tow package on his Dodge truck and I could hook the Jeep/Mopar Harness up to that to test.
Another note, your Motorhome will need 12 VDC on the pin 4 of the receptacle. There were several posts to that issue for those that could not get the harness to work.
Now, after I got done I found out about another harness that could be a lot easier to install. This is the "Tow Daddy Plug-N-Tow system". Google it for details. I am fairly sure I would go this way if I had to do it again. You can also see this site, Wrangler Towing Upgrades
for a very good article by Mark Quasius on setting up the Jeep.
Hope this helps.