Hi robin,
Haslar is free, plenty of parking there also.
its a compacted slip which is useable 3 or 4 hours either side of high tide and well sheltered.
pete7 knows more about it than me as he introduced it to me
boat launch have a good write up on it.
there is a number of other slips on the sea front but in a SWerly are dodgy. At least for me !!!!
Al in my less than humble opion
Paul