Max and trailers don't seem to mix, and with the new move for fare inspection, I suspect you won't get away with a trialer.
Panniers, however, can unhook and be "carry on" for which there doesn't seem to be a significant restriction. It they are well strapped to the bike, you just have to have the umph to get it on the hook. MAX still frowns on standing with the bike unless the car is full.
How loaded do you go camping, dmc?