I'V fished the boat house most of my life, 10yr old & Im just about 50, I have found that 100 yrds to the Left is the best, towards the lighthouse, just short of half way to the prom, I have chucked 100 ish yards down to 20, somewere in the middle, a nice easy chuck say 50 ish yrds,.. the ground is sandy, but boulderish, if that makes any sense, get down on low tide, you can see what you are fishing on, thers some sand banks and rocks, between them thers some worm banks that tend to shift around a bit, so again go down at low tide and have a look,I used to mark a spot with a bit of drift wood stuck into the cliff with 50,70 or whatever cast you need.