I thought about getting a flippac but ended up going back to a trailer after I sold my previous one. I love my trailer. I can take it anywhere I can get my truck. For me setting up camp then being able to drive the truck to various trailheads for climbing or fishing without having to pack anything up make the towing of the trailer worth it. It's so easy to tow anyway. I rarely only stay put for one night but if I do I don't even unhook the trailer from the truck. I also like having all my stuff in the trailer ready to go and stored in the garage. A trailer is more versatile in my opinion than a truck mounted platform but most importantly it works for me. If you plan on moving camp daily for most of your trips then a truck mounted platform may be better.
"If there must be trouble let it be in my day, that my child may have peace." Thomas Paine
2003 Toyota Tacoma DBL Cab TRD
2007 Adventure Trailer Chaser
1987 Toyota 4runner Turbo