I did once because I was un-aware of the LP restriction. Vehicles carrying LP in excess of 10 LBS, or 10 containers are restricted, that time cheated and when asked, I had no LP. That was first time rooky luck, by accident. There is a hefty fine if caught.
You can get around this restriction legally by draining your LP tanks before the trip through the tunnel, that's allowed. I got through this way on a trip north and south.
You can find LP on the other end if needed.
Dan & Loretta, US Army Retired Aero Scout Pilot
2012 Fleetwood Providence 42P Class A/DP
Spartan Chassis, 8.9L Cummins 450HP