Being reasonable on a public land is of NO concern of the owner of the property. It is a concern of appointed Governement bodies(Municipality,MNRF ,Police...whatever).
if those "bad"people TRESPASS from the lake onto his property-then he has all the rights to deal with it.
No different then someone would trespass from any other direction onto his property,and make a mess.
The owners of the property DO PAY taxes for THEIR land,and if that happens to be a lake front-Good on them.They still do not own the lake front(from 20 feet from highest water mark).Tough luck.
As far as your 3-rd point is concerned-I am not offended with any of this. Hovewer I think that whoever (outfitter,rich guy or John Doe)owns whatever, same rules apply to all of them related to -limiting use of a Public Property.
I understand -if they build a road for themselves ,on their property-they rule.
Else is -just a nuisance to deal with (part of the package of ownership)-no different them my backyard or your backyard.