First of all, LOOK UP TEXAS KNIFE LAWS FOR YOURSELF. No disrespect to police officers or you, but when it comes to guns and knives I have seen and heard of a lot of missinformation given to people from LEO's. I have heard of them telling people that something isn't illegal that actually is and even worse, telling someone that something is legal that actually isn't. Please do your self a favor and look at the laws for yourself or have someone show them to you and explain them.
Secondly, If I was looking to pass a knife down to my children, grandchildren, or grandchildrens children, I think I would want something with natural handle materials on it. But that's just my opinion. A couple of others have mentioned looking at the Makers For Sale area, and I would have to whole hartedly agree. You can get yourself a handmade, heirloom worthy knife for about the same or near the same price as a good production knife that will perform just as well if not better than any production knife. Here's a link:
http://www.bladeforums.com/forums/forumdisplay.php?f=754
Look around and check out some of the offerings they have, take some time to look through all the pages to see what has been sold in the past. Chances are that if you find something you like you can contact the maker and request one, or most of the makers have links to there websites in their signatures.
For what you discribed, I think that you would want to look for something with a 3"-4" blade. I have never used a knife with more than a 4" blade for any camping, fishing, or hunting chores, and don't feel the need to ever get anything with more than a 4" blade. I do bring a hatchet camping though for splitting firewood, I think you would be better served with a 3-4" blade knife that rides on your belt and a hatchet, matchete, golok, etc. to stay at camp or in/on your pack for the large camp chores. Not that you can't baton a 4" knife if you need to. I could bring a single telescoping fishing rod on my camping trips and still catch fish, but since I have room in the truck I might as well bring a couple different nice rods for different situations and actually enjoy fishing. Of course not everyone will see it the way I do. Of course I could bring only one 5 1/2" knife to do everything and have knife that is just a little too small for chopping and spliting wood and too big for cleaning fish and game, but at least it will get the job done. Or I can take a 3 1/2" knife that is the perfect size for cleaning fish and game and making marshmellow sticks AND a hatchet or very large knife that is perfect for splitting firewood and cutting tree limbs etc. But like I said, if you were in a survival situation that 3 1/2" knife on your belt will still be able to do just about everything you need it to to survive, but while you're not surviving and your at camp you might as well enjoy haveing a second blade.
Just my .02 cents, a long winded .02 cents at that.