Hi Paul,
The boat roads were pretty clear but if you got out of them very far you could get into the 'weeds' pretty quickly. There were lots of lilly pads and another that I can recall the name of.

They are having a very vigorous education campaign about the giant salvania and getting people to check their boats both before and after putting in or taking out. There were signs at the boat ramps, the canoe rental place and at the ranger's office. It's really nasty stuff as you know.
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