Re: How long (reasonably) does a tank of CNG last?
FWIW our 10# bottles give us about 40 hours of burner time. Depending upon your cooking, that will last you quite awhile. We carry a couple of small disposable bottles, sealed in vacuum bags in the propane locker, together with an adapter against the possibility our main bottle runs out, but that has not happened before we've refilled our bottles yet. The pressure cooker really is a great aid and will save fuel. One needs practice with the device, and perfect recipes at home, before using the device aboard. There are some very costly models and some much less costly, e.g. the Stainless Steel Presto, and cost does not seem to be a deciding factor to the usefulness of the device.
"It is not so much for its beauty that the sea makes a claim upon men's hearts, as for that subtle something, that quality of air, that emanation from the waves, that so wonderfully renews a weary spirit."