This is, unfortunately quite true... the only area that I know where people are having some luck finding space is under 27/28 feet and on the North Shore where the unavoidable fact of being behind tidal gates in either direction is a given.
These conditions are an even bigger disadvantage with a smaller, slower boat.
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
1984 Fast/Nicholson 345 "FastForward"