Dont forget 50% of our fish, bottom dwelling fish dont show up on the fish finders, if you have a fish holding bank or mark give it a go.
As the safety officer for the club we are always careful to point out that training and VHF radio licenses are essential when going to sea and life jackets should be worn at all times. Make sure your jackets are tested each season, as Brian said join the club and be safe out there amongst fellow club members.
Also as an observation on your post, we are on last quarter tides before neaps you should have no difficulty holding bottom in the bay on 8oz leads, are you fishing nylon straight through or braid?