Trailer all the way. Even if you hotel a run, anything beyond 2 people the Jeep can't handle. Think the overnight bags, cooler (2 if you separate drinks from food), pillows, blankets, dog, etc. If it in the cold season, add cold weather gear. I usually have 2 kids (14/12) with me now wheeling and I needed that extra space. We took the dog also and that turned out to be a real crowded TJ.
I first put together a cargo trailer using the back end of the boat trailer. I used the tongue for another trailer, camping trailer. I intended to throw a car top cargo carrier on the cargo trailer, but it was a little large for that. I dropped the suspension, added 13" rims and sold it. With the boat tongue, I'm putting together this camping trailer. Its basis is a M101 military trailer frame and suspension. I added a Dexter 3500# axle with parking and electric brakes. I'm adding a kitchen box on the back end.
Its a Quicksilver truck bed slide in camper. Its just an aluminum box with a canvas top, weighs only 450#s.
I recently purchased this PWC trailer for cheap and plan for a hotel/1-2 sleeper. I'll add suspension drop brackets, swap out the slipper leafs for some Sami leafs using only 2-3 leafs and the shackle.
I found this Roughneck idea and this appeals to me. So I'll look for a truck bed camper top, preferably one with a door (contractor), and have something very similar.
If you still prefer a cargo trailer, search your local CL for a motorcycle cargo trailer. Or you can make you own. Harfor Frieght has 2 mini-trailers in the size about 40x48", one with 8" rims, other 12". Or go with a pwc trailer and add a couple of boxes. You can search for expedition style trailers also.
