I can't honestly tell you much about what the NPS is doing other than asking people at the gate if they've been in any mussel infested waters. I store my small houseboat offshore, north of Bullfrog and it never goes anywhere but LP, so when I bring it through the gate, I immediately tell them exactly that. They hand me a one page form, which allows me to check a box that says the boat has not been in infested waters, then the form is dated and placed on the dash of the truck. I do know that if you fail to display this form on your dash, your vehicle and trailer will be impounded, which would be quite a surprise to have upon returning from a nice cruise. I believe the fine is very stiff as well, as in several thousand dollars.
I have only see the decontamination facilities at Bullfrog, not at the south end of the lake, but I imagine they are identical. They involve using very high temperature and pressure water to clean and kill anything riding along in the boat. I think the preferred method of decontamination is to have to boat out of the water for an extended period of time.
I only brought it to this forum's attention because I know they are taking it very much more seriously now than they have in the past. The lower end of the Colorado River system is terribly infested with these mussels. At some point, if Lake Powell is still free of them in the future, I would imagine there will be some additional inspection mechanisms put into place.
My hope is to someday have a C-Dory and cruise many different places, but I love Lake Powell and will always continue going there, so once I am able to cruise other areas, I'm sure I will have to deal with the issue of possibly having my boat become infested as well. I believe the Great Lakes have them, as does much of the Mississippi. I'm no expert, so I could be wrong.
The NPS has more information about the whole issue here:
http://www.nps.gov/glca/parknews/upload ... 080125.pdf
(If the cut/pasted link is truncated, just go to the main GCNRA page here:
http://www.nps.gov/glca/
In addition, they have a link on the main page to get your own self-certification packet before arriving, which saves time when you go through the gate.
Even though I don't know all that much about the problem, I know enough to realize that once a body of water is infested with Quagga or Zebra mussels, it is a terrible disaster. The Keep Lake Powell Mussel Free website has some pretty interesting information.
Tony
NA0US