John, I think the times you can visit may be dictated by the ferry company! I read on another forum that it was impossible to get a boat over after the Tuesday of practice week. My suggestion is to ring the Steam Packet (don't bother with the website) and find out when you can sail & base your arrangements on that.

I'm also told that accomodation is pretty much full so talk to the Tourist Board about home stay.

Alternatively, ignore the wives and go for the fortnight!