You and me both. I don't let hard sided or big roller bags on board. I don't have room to stow them and they are in the way on the deck. They can sit on the dock or put them back in the car.It irks me to no end when people bring on containers that do not fit under their seat. This includes some wheeled duffel bags with stiff backs, most regular luggage, and oversize tubs. These items then litter the boat and prevent easy movement. This is particularly an issue when seas are up and movement is already difficult. Nothing like tripping over someone's bag. I wish that operators would control this situation and leave large containers at the dock or in the diver's vehicle.