Rick,
On the watermellon you can freeze it. Firm -fleshed well colored ripe melons. Allow 4 lbs for each quart. Pack tighlty into moisture-vaporproof freezer containers or bags.

I haven't done it myself but have eaten canned meat and steelhead. Nummers ! You need a presurer canner for the meat and do a hot pack with meat stock.

Good luck