Thanks again for all the replies. Super helpful. I started looking at the F350 mainly because it's about the same price as a comparable F250. But it sounds like there isn't much difference. I know most FW's need a truck bigger than 1/2 T, especially with a W/D.
If an F250 with tow package has the same capacity as a 350 then that opens up a little more options. I know it's all in the numbers. All we've ever owned is Class A's and it's a different set of calculations. I want to get the most bang for my buck with a truck and also have extra capacity should we ever decide to buy a bigger RV. You can't have too much truck.