Help. We have a Ford Windstar 3.8 V6. Currently pull a 10ft. Jayco pop-up, and we don't even know it is behind us. Looking at a 19ft hybrid. Total weight with all options is 2888. Dealer says I should be able to pull a larger trailer (which I really like). Total weight about 3400. Towing capacity says 3500. Door on Van says GVWR is 5140. I have folks telling me to go by weight on door. Can I pull either of these trailers? Would really like to get the larger one if possible, but can settle for smaller.