Technically you don't even have to look at your GCVW YET, because your tow hitch can only tow a max weight of 3500 lbs.
So you are already over that weight.
But Bob brought up a good point about GCVW, see what your is.
Tongue weight and towing capacity are 2 different things, that guy, does not know what he is talking about.
It is your decision and no one else but you should deceide weather you can tow it
Your almost 500lbs over, any way to trim some weight off the Jeep? Maybe put the spare tire for the jeep one of the Bay doors etc.....
2005 Tiffin Allegro Bay 37DB
W22 Workhorse Chassis 8.1