What about a radiator pep cock? Just saying.
Remember that this will be under the vehicle and susceptible to being knocked off or knocked open. That will also be a problem using the valve stem.
We first need to find out if water inside the tube is a common problem.
I am now looking into a weighted tube that can be fed down into the intake track. In the rare event that we needed to remove water from the intake tube, you could siphon it out. This could be done without crawling under the vehicle or removing skid plate. This would probably be the safest way versus putting a hole in the intake track.
Another thought I had, would be fixing a nipple on the bottom of the intake tube that we could attach a hose to permanently. Then you could siphon it at any time without having to run a tube down the intake track. But this goes back to putting a hole in it and risking the nipple falling off or being knocked off which would result in the open hole