I had the brophy pocket style tie downs on my first camper and quickly moved to a happijac down as I didn't find them very sturdy bending themselves and somewhat mangling the truck. That was over 20 years ago. Maybe they work better now. I switched to happijac bed mounts and didn't like them either as they tore the sheetmetal on our 1994 Ram. I know others here have had better success and I'm sure the product has improved over the years. After the happijac we went with a frame mount that has worked well on the last 3 trucks and 4 campers. I believe you can buy just the fronts if you are doing your own thing on the rear. Some sort of spring is recommended by most camper manufacturers to relieve stress on the camper.