And to further confuse. Big Bend National Park allows guns

https://www.nps.gov/bibe/learn/management/firearms-regulations.htm

Unless it�s about Mary Jane evidently-

Correct

I have done some research and it seems as if the only way a CHL/LTC can carry on Corp lake is to get written permission from the District Commander.

Would a cop or GW give you ticket or arrest you for carrying on a Corp Lake, I guess that would be his call to make.
Under the US Code of Regulations, Title 36--Parks, Forests, and Public Property

CHAPTER III--U.S. ARMY CORPS OF ENGINEERS

PART 327--RULES AND REGULATIONS GOVERNING PUBLIC USE OF WATER RESOURCES
DEVELOPMENT PROJECTS ADMINISTERED BY THE CHIEF OF ENGINEERS

327.13 Explosives, firearms, other weapons and fireworks.
(a) The possession of loaded firearms, ammunition, loaded projectile firing devices, bows and arrows, crossbows, or other weapons is prohibited unless:
(1) In the possession of a Federal, state or local law enforcement officer;
(2) Being used for hunting or fishing as permitted under 327.8, with devices being unloaded when transported to, from or between hunting and fishing sites;
(3) Being used at authorized shooting ranges; or
(4) Written permission has been received from the District Commander.
(b) Possession of explosives or explosive devices of any kind, including fireworks or other pyrotechnics, is prohibited unless written permission has been received from the District Commander.

Nowhere does it state a CHL is valid, or that state guidelines overrule the federal.

I believe that the 'Castle' Doctrine should apply on any lake in Texas and neighboring state.

Not confusing. You first link ended with this.....

And illegals apparently. It is pick and choose which Federal law to follow and which to disregard.

Lots of discussion and controversy over jurisdiction on Army Corps. of Engineer lakes. 100s of articles on the interwebs. In a nutshell, the Army Corps of Engineers Police are few and far between and under funded. Most will tell you they are not going to approach someone and ask if they have a gun without backup. Game Wardens work for the State and to hold someone who violates this law would be a nightmare of both time waiting for the nearest Corps. Police to get there and the paperwork. I'm not leaving my weapon in my truck, never. I've had a CHL since 99.

I'm just glad the GW never looked underneath that TFF towel in my console.

you told him no, right
even if you have one

IMO the don�t ask don�t tell policy applies here. Very cliched, but it�s better to be judged by 12 than carried by 6.

Then again I�m not one of those fools that pulls a gun out in the middle of an argument either.

Where are you fishing that you need to carry a gun on your boat?

Are there Somali pirates on the lakes now?

From what I read about vehicles being broken into while the owner is away fishing I would carry my weapon with me rather than leave it in my vehicle as a target for theft.

Probably the ramp that he's worried about, or the drive to the lake and not wanting to leave a gun in the truck..
Lot's of methy areas around lakes to give one good reason to carry and also worry about break ins at the ramp.

Yup

There might be a few on Falcon.

Not so sure that they're Somali ... but yeah, probably some pirates there nonetheless.