I go upto canada about twice a month with the Jeep, sometimes on the trailer (flatbed) sometime driving.
Required: CLEAN. One time I tried my luck with being dirty. The guy was really nice, told me to go into Lynden and get it cleaned and come back. I did just that :awesomework:
Going back to the states, never had any issues, and I've had the rig dirty (on the trailer). I think the guy was more focused on me and the truck than the trailer and rig.
Insurance doesn't matter
Street Legal doesn't matter (I DROVE the XJ HEATHEN tube thingy in and they didn't care!)
Make sure its CLEAN
Don't look/act sketchy. Lucky for me I look/act like a pasty white computer geek. it makes the crossing very easy :;