SherWood, there is a TEAM of folks here that can ensure you have fish available. I understand your concerns. Everyone that has posted here so far can see that you don't have to go without-if it becomes that emergent.
I can't help but think if food is your primary concern, maybe this should be a catfish production pond?
Further to Snipe's comment, if you did want to focus or 'help' the Channel Cats, you may want to create spawning structures for them which are not always present in many ponds. You need cavities or sections of piping for the CC to spawn.
ANOTHER CONSIDERATION: You may be able to set up some net pens where you could grow out certain fish before exposing them to the greater pond.
