Sounds like a headache. At least its possibleThe trick is that if you came out, yes, you could pay to be decontaminated at say Lake Berryessa and fish. As long as you came off the water prior to the marina closing you could have your boat banded so that you could get back on the water without going through the process again. However, you could only get back on Lake Berryessa. If you missed getting your boat banded (a process where a serialized zip tie is put between your bow eye and trailer) when you got off the water then you would have to be decontaminated again before launching. The bands are unique to each lake and there is no reciprocity between bodies of water. The decontamination process varies in price by location as well as the type of boat and how intensive the process has to be for your boat type ie. number of bait wells, livewells, bilge, ballast tanks, etc. Plan on it being at least $100 for a bass boat though. The other issue is getting an appointment to be decontaminated. Not sure if they've gotten caught up now but initially they only offered so many appointments per day and it was booked out something like 2 months! There's a reason that my boat only goes to Clear Lake!!!! Hopefully that doesn't get screwed up! I used to complain about my $20 a month mussel sticker fee but at this point I'm happy to pay it to still be able to fish what I consider my "home" lake!