I run a Ford and no issues yet, now on a 3_4 ton but ran 1_2 ton for years. I found the ford 1_2 tons could be light on springs on the back depending on how they were speced, may be an issue depending on hitch weight, otherwise ran well decent mileage if you can get that on a truck 15-24 mpg depending on wind, load etc. I don't remember when ford changed body styles but I think 04 if so the 04's have been beefed up considerably, if prior to 04 you could get a 7700 gvw which is a heavy half basicly, 5.4 l engine, heavier tranny and bigger wheels and brakes, can't comment on milage but anyone I know that had one liked them. My dad is a GM man, pulled a 25' 5th wheel with a chevy 1_2 ton and it was ok but he ended up upgrading to 3_4 ton as well but he is planning on longer trips as well. He had no real complaints either on his truck. I would not be afraid of the toyota or nissan trucks from what I have heard, only concern is they are a phisically smaller truck so wheather this would affect camper handling I do not know. Probably confused you more but maybe not.