I'd consider getting a shotgun scabbard and leaving it loaded with the safety ON in there. Reasoning: to keep anything from snagging on the trigger guard and keep the shotguns finish from getting all scuffed up from loose items in the back.
I did see one video a while back were a guys safety didn't work properly after he installed an aftermarket pistol grip. Make sure that works ok.
"There is only one kind of freedom and that's individual liberty. Our lives come from our creator and our liberty comes from our creator. It has nothing to do with government granting it."