Was wondering if any use a gauge on their propane tanks. If so what kind and are they accurate? Wireless monitor inside the trailer would be nice but probably overkill...
If the automatic switch over regulator is used properly you will always know when your propane is half gone and have a bottle to be filled. What else could possibly be needed?
If you really need more capacity get larger bottles or a third to swap in immediately.
If your regulator is not working I recommend Cavagna available on Amazon.