Looking for advice on adding a larger propane tank

[Rockingladiator]

Looking for advice on adding a larger propane tank for extended trips. We added a 22" Blackstone with plans to run a heated camp shower and buddy heater. 1) What size tank is best for capacity and max storage (2) Where is the best place to purchase the tank. Any input is great appreciated.

 

[Crawler80]

I can't really thing of any other place to mount this other than the bed mate. I do no have much experience with propane tanks to be honest. You might be better off having a look on google