Took me a minute to figure out what the problem was. You like to use the other one for the smoker, that I'm assuming you leave at home?
The suggestions above will solve that. Just so you know, the reason most campers come with two is to prevent you from running out and having a backup. Something critically important since you have 30LBers which are not easily exchanged at the corner convenient store. I'd invest in one of those tank gauges that stick on the side of the tank and you pour water over to make sure I knew exactly how much propane I had prior to each trip. That or take the tank loose and weigh it on a bathroom scale. Getting refilled at a propane dealer might be a lot longer trip than you'll be happy with from some campsites.
2015 GMC 2500 Denali Crewcab 4x4
2019 Forest River Wolfpack 23pack15
Hope your travels are safe and the friendships made camping are lasting.