Been sampling the stock, Mister PharmD??
If you look closely, you'll see the tank holders (similar to the ones on dive boats) built into the bed of my truck. Also, what you can't see is the brace and support between the two tanks that's latched to the back seat to keep the tanks safely secured during transportation.
To don the tanks, I remove the braces, sit down on the bumper, and off I go. At the end of the dive, I just sit right back down and let the tank rest back into the holder.
Sorry, Grier. Looks like you'll be sober tonight.