We have the PullRite 24K Superglide hitch. The 24K Model slides back automatically 18 inches when you turn. The hitch and the rail system (underbed mounting setup) will set you back around $3,500. Seems expensive until you price the trailer and cab repair cost after they get together. We love it, no problems, sturdily built, well engineered, just a great piece of hardware. The reason we went with the PullRite is the fully automatic operation (no lever to pull).
Best solution is, get a long bed.
Whats the price tag on a long bed conv kit for 2004 q-cab?