I suspect that most marinas have a minimum length/fee and if your boat is
smaller than that, you pay the minimum anyway..

That is the way it is for a seperate dingy tie up at my marina.. 10ftX$5=$50
month.. Normally I tie up my dingy under my bow or stern quarter, however
last summer I was anchoring out and needed a place to land my dingy and park
my vehicle. The charged for 10 ft even though my dingy was only 8ft.


--
My opinion and experience. FWIW

Steve
s/v Good Intentions