We have a few 8' underpasses here on LI...
If you go to
this page and scroll down to where it says
Vehicle Type: Truck, Van, or SUV
Usage: Regular or Combination There is a footnote that says the following:
Note - A pick-up truck can be registered as a passenger vehicle if the gross weight does not exceed 8500 lbs. and the vehicle is not being used for commercial purposes. Registration fee does not change.So it sounds like the laws are similar to NY except CT allows up to 8500 lbs instead of 6000 lbs like NY. "Combination" means combination personal/commercial so that wouldn't apply unless you use the truck in a business or for hire when the camper is off.