Originally Posted by thetiler
Another question is how should I set up the companion head before I go pick up the trailer to keep the 7" off the bed rails ?
Don't try to do it ahead of time.
With the trailer connected, the trailer must be level, front to rear. So adjust the hitch head and the pin box until the trailer is level. After the trailer is level, then check the clearance between the top of the bed and the underside of the 5er during a sharp turn.
A nose-high 5er is a no-no. Don't do that. Get that trailer level for safe towing on the road.
If you have less than 5" clearance with a level trailer, then you must either lower the truck or raise the trailer on its suspension. 5" is the minimum clearance you need, and even then you have to be wary of ditches and dips. 6" clearance is even better. 7" clearance would be a luxury few can achieve and still have a level trailer. However, if you plan to go "off road" such as, for example, a Jeep trail up to a hunting campsite in the mountains, then you want 8" clearance or more. Else you'll have dents in the top of your bedsides. (Been there, done that.)