Location to Leave a Small Boat on a Trailer in Norfolk

[Paul]

I got a small 16ft open boat, Dell Quay Dory style, and I'd like to
leave it at a small Boatyard somewhere near the sea in Norfolk.

I have been going to the South Coast sea fishing but now I'd like a
change and go somewhere I've never been before. I live in Rugby near
Junction 1 on the M6.

Anyone know of a small yard or place I could leave my boat safe and
secure so I don't have to tow it to the seaside. I'm willing to pay to
leave it there of course.

I intend to use it one weekend a month to go Sea Fishing.