I did take the Dismal swamp and the duckweed was not an issue at all until i got out of the second lock. It was never seriously thick but it did clog with something in the end.
The strange thing was that the strainer didnt look that bad but the hose going to the raw water pump
was sucked in indicating an issue. I used the air horn on the hose after clearing the strainer and it was fine after that. Glad I heard about the horn trick because I think the issue was at the valve or in the hose.
It was still worth it. Have fun and if you see a bear take a picture and post on here please. We hiked looking for one with no luck.