Years ago, I remember reading about many people who run sand paddle tires without foams and sealing their tires with sealant, no valve stem. But if IIRC they would run a strip of duct tape on the inside of the tire to try to prevent the ballooning effect. Another thing, when storing their vehicle with these tires, they would leave it on the stand. Or most would just replace the tires.
I friend of mine along time ago sealed his Tmax tires and added a valve stem and blew em up and would drive it on water lol I just wondered if it would still be drivable doing my Baja rear tires like that... guess i’ll Give it a try when I have time