I carry a full set of cordless tools just because I own them and I am not leaving them in storage for the batteries to die. I have a full set of sockets that I keep in my truck all the time. With my craftsman box and some extras in the drawer that are specific to my needs and I can do anything I want to. it is this one.
http://www.sears.com/shc/s/p_10153_12605_00933260000P?mv=rr
I have rebuilt motors, changed transmissions, installed airbags, 5th wheel hitches, exhaust brakes, rear ends, shocks, stands and tie downs and pretty much everything else I have done in the last 4 years out of that box. I also keep a 3lb mini sledge hammer for things like rebar and things that may be in the ground that could puncture a tire. I also keep a 12 or 15" crecent wrench in a storage box because just when I think I won't need it, I have used it 3 or 4 times to bend things back to where they should be or to tighten trailer balls or to just use it to hold a flexible piece of material when I need to drill a hole in it. It works surprisingly well.
I have a saw-zall in my cordless tools but if not I would have some sort of bow saw, some hedge clippers or snips for those times that limbs are hitting my fents or antennas. Sawzall is great for getting fire wood as well. saves the arms. I have a 2-3lb dead blow hammer to keep from marring and deflecting pieces. I use it more than any other hammer I have ever owned. I have a small drill bit assortment. I have a caulk gun as well.
I also bought an extendable paint handle that is 7ft long from Home depot. I bought the wash brush that goes with it and I also bought a windshield bug scrubber that will screw onto the same handle. This helps with the bugs on the front of the camper.
I am going to be buying a telescoping ladder so that I can get to the front areas of the camper because the ladder on the back just doesn't cut it for all applications.
The other things are listed... 12ton bottle jack because it was on sale as cheap as the 6 ton. some small jack stands and rubber wheel chocks for the trailer.
I also bought a 2gal air compressor that I keep in my truck toolbox. It fits nicely and airs up my tires, airbags and air ride hitch. I also keep a clip on tire air chuck and let the compressor work for me. I set the regulator at the pressure where I need whatever blown up to and clip the chuck on and let it run till it stops. This helps a lot when you are airing up 10 tires, 2 airbags and an air ride hitch.
Just some of the things I have.