I too have the natural gas-propane problem. I like the natural gas but it is not available anywhere on the Olympia Peninsula including for your house. That gives me the option of going to Seattle and that involves a full day and various ferries and floating bridges, etc or going to Sidney and exchanging bottles which is easy but costs $130 per bottle. I am going to switch to propane also. The 34-2 has a locker at the stern also on the port side for a larger bottle. When you change over, there are several things you need to do. You have to change the jets in the stove. For many stoves, you can buy new jets or, if you can't, you can have a machine shop fill the holes in the current jets and redrill them to the correct size which, if memory serves right, is .028". You need to change the hose from the stove to the tank with a propane rated hose (a hose replacement would be recommended in any case). You need to replace the regulator and be sure that the stove is the only appliance on that line. You need to insure that there is a drain from the bottom of the tank to outside the boat above the waterline. Do not splice into a cockpit drain line. The top of the locker should be sealed with weatherstripping. No storage other than the propane bottle and regulator is allowed in the locker.
This doesn't cover everything but hopefully gets the thinking in the right direction. Oh Yea! A propane sniffer in the cabin is a good idea along with a CO2 monitor.
Good Luck.
