Storage facilities at Poole Harbour for Hobie Cat 'Wave' & trolley

[Cheltman]

I am bringing my Catamaran back from Spain and want to keep it at Poole Harbour to sail weekends. It is only 13 foot long and has a lightweight launching trolley.
The sailing clubs are a bit 'sniffy' about Cats and only want mono hulls!
Can anybody recommend a suitable place?