re: Nearest reservoir or clear water lake near south east La?

i spent a lot of time on (and in!) Belle River and Lake Verret in college and in my 20's.

Looking at properties on zillow, most on LV or the surrounding rivers/bayous are on leased land. How does that work? it says 5 year lease. in 5 years the land owner could decided they don't want to lease to you any more and you're screwed?