I assume you have a boat & are seeking crew - if so, simply pre-announce your next trip on here with a request for assistance. I'm sure you will get a couple of suitable applicants from our membership.
If you are boatless & seeking experience, just ask, stating acceptable locations. This is a well frequented forum, I'm sure someone will help.
Edit; I just checked your profile, & see you have a Kelt8 in Gosport. Anyone in Gosport area got skills they wish to hone?
I'd not noticed before that this site has a crew seeking sub-forum. As I'm also looking for someone for a radio ham lighthouse trip, I posted on there (http://www.ybw.com/forums/showthread.php?t=245071) and will be interested to see if there are replies.