With your payload rating, look at Coleman 274Bh. That's what I have and pull it with an F150. With all my family I am over my weight by #400. That is with 5 people in the truck, BUT my payload is only 1470# and I have a topper on the truck, and a generator in the bed. Max tongue weight I have measured with all our stuff and a full FWT is 764#. I am going out west next week and the trailer is fully stocked and ready to go, and before I pull out of the drive I wil weigh the tongue once more to verify the weight, but with a half tank of FW, I don't expect to be anywhere near the 764# it was at last time as I had my wife and kids stand where I think the FWT is located to get the reading.
Since there is no way I am getting rid of my truck for one with higher payload, we will just take two vehicles, my wife has a Focus that gets 40+MPG, so we have a getaroundtown vehicle with us. This way I can keep the topper on (#200), and take the generator (#100). With 3 adults and two kids, I would still be over the limits of my truck if I removed them, but with only 4 people, provided 2 are kids, no topper, and no generator, and a higher payload, I can see your Expy pulling my type of trailer without any issues.
