5bites, here's the deal on fishing tournaments on Corps lakes while carrying ... as long as the law states that you cannot legally carry on COE property, you have broken the rules of most tournaments the minute you enter COE property with your gun. Why? Because practically all tournaments have a rule stating that you must follow all local, state and federal laws and that breaching any of those laws is grounds for disqualification.
I'm not anti-gun by any means, just stating a fact here. If you insist on carrying against COE regulations, there aren't many tournaments you can legally fish.