You needed a bigger truck from the beginning. I know I'll get torn up from the EB crowd, but it's just won't handle as well as a 3/4 ton. Yes, I/2 ton trucks are much improved over the last few years, but so are 3/4's. You will still feel the push and pull, you will still feel all the same things you feel know. What you don't feel now is the firmly planted to the road feel that a heavier truck will offer. Gas or diesel won't make that much difference for the average weekend tower. There are advantages and disadvantages to both; just depends on how you plan to use them. You have a large trailer. Get a tow vehicle to match the load. Let the defense on the field now!
PS. Golf carts are much improved too!