Cruising,
many docks particularly on the East coast ICW are very long and everyone goes along side.
The operators skills level are so low that huge long hoses are used to refule , rather than have the boat actually move.
For storage 20 ft of beam is very expensive as the dock will be built for an 80 or 100 ft boat and in many places you pay by the SLIP , not LOA.
In some places in California you pay by the SQ foot (not LOA) , again not cheap for a big wide boat.
The usual multihull route is the end of the dock , but thats PREMIUM space (no neighbors on one side and a View!) . So there can be years of waiting , a premium to be paid , and the end can be very ROUGH .
Requiring a Breast anchor to hold the thin skinned light weight boat from smashing thru on the dock.
Best for any multihull is the mooring.
My experience with a 45ft Tri from 1965 to 1973 living aboard in NYC area.
Hard to heat in winter too,(mucho surface area).
FAST FRED