I have the small propane bottle like you for the same reasons. However, since I tow with a truck I just carry it in the truck bed.
At camp I want to have a portable propane stove near the TM and a propane grill on the picnic table.
So I take one of the two tanks off of the front of the TM to use as my third tank.
Can you do the same? Perhaps your TM only has a single tank.
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