Are there boat dock there, so you can go by boat?

Public Pier right there. No charge.

Yes

There is docks close by. Not sure the prices. Might have to Google search the St Petersburgh Pier for that info.

Yes there are there's about 10 slips weekdays has $2 and weekends is 2:50 but I would call ahead of time to see if there's any availability very nice. Docs

Yes, 2.00 per hour weekdays, 2.50 per hour weekends. Pay station at the dock exit. Park mobile available also.

Yes there is a dock but don't know prices or any details