You will be required to change the existing POL type valves over to OPD style before they can be refilled at the local LP place.
There should be a local company that can do this for you. Call around beacuse prices vary widely. Also be aware that the Alumimum tanks require a difffrent OPD than the Steel ones do. I belive both can be fittted with the gauge, but your LP guy can tell you for sure.
As to the being nuts, that is a requirement to own one in my book. I drove my motorhome almost 1000 miles round trip between thursday night and sunday night to get together with other forum members for 2 days. Nuts, yes. but worth every penny and taking time off from work to get together with others that share our affliction.
WBCCI #5501 AIR # 49
1978 Argosy 28 foot Motorhome
Wise men talk because they have something to say; fools, because they have to say something. -- Plato