Re: What Type of Jack?
The scissors jack in my GMC Jimmy is perfect for my trailer, so I don't carry a different one. I do carry an X wheel lug wrench in the tow vehicle. The wrench that came with the SUV is wussy, even though it's the right size. It's come in handy, too, for helping out others when they don't have the right wrench for their trailer lug nuts.
My SUV toolbox also has a 24" long breaker bar and a set of heavy-duty six-point sockets, just in case. There's a socket for my hitch ball, too, and a 24" pipe wrench. A 30' tow chain is in there, too. A guy just never knows what's going to come up.