I've had several SUV's, and most any of the mid sized ones will do what you want to do. But I still like a truck better. Anything that will pull the trailer ain't gonna get significantly better fuel mileage. A 4X4 Tacoma with 4 doors and a cap on the back will cost less than a comparable SUV, get the same fuel mileage, be more versatile, and resale for more down the road. When you have to haul off trash inside of an SUV you'll appreciate the truck, and the back can still be hosed out even with a cap on it.
I could get by without a truck and tried it for a few months. If you're used to a truck you'll be back.
