Yes you can bypass the regulator on your trailer tank and go directly from the grill to your trailer's quick disconnect. What you're going to need is the MB Sturgis Propane Adapter Hose - Model 250 Quick-Disconnect # 100476-72-MBS and the MB Sturgis Sturgi-Stay T-Fitting # 103613-MBS.
From here you will just connect the Sturgi-Stay T-Fitting to your trailer's tank and run the adapter hose # 100476-72-MBS to your Coleman RoadTrip and you'll be all set.
I've also attached a diagram of... view full answer...