A few things to note:
They cannot search the boat without probable cause.
What constitutes probable cause is ambiguous.
The "smile and wave- can't catch that eddy" method works great on the river, but beware them waiting at the takeout. (If they ask which takeout, tell them DallaBetta or High Bridge, then takeout at 4Corners.)
Conceal all containers before arriving at the takeout and be discreet when floating.
A friend of mine the other day offered me his Nalgene at the put in and when I asked what it was he said- "Tequila- since the cops banned beer, this is my only option." The irony is ridiculous.
The problem is usually caused by tubers in late July, early August- so by the next Spring, the cops are all fired up and ready to bust whoever is on the river- well, in May/June- that's us. Then by July, the cops have gotten slack about it again and here come the drunken tubers. It happens this way every year, but this year the topic has become so public that it will be worse. My .02 anyway.
"There is NOTHING--absolute nothing--half so much worth doing as simply messing about in boats. Look here! If you've really nothing else on hand this morning, supposing we drop down the river together, and have a long day of it?" -Wind in the Willows