This type of thing really burns my berries.
Instead of looking for opportunities to encourage the large number of people who chose to recreate on and near the Lake to stay and spend even more money in their community they want to make the problem (out of towners) go away. The main reason this type of thing happens is because the people who run and are voted into positions of power are only concerned with the short term (the next election) and easy solutions (in this case taxing people who have no vote) to complex multi-levelled "problems".
I'll buy my supplies elswhere.
The best options would be to remove the park and the parking lot. That way there are no maintenance costs, no grass cutting, no snow plowing, no garbage clean up. Problem solved. If the people don't get the hint then put up a giant wall around the lake the, keep all the smelly people away.