Need help with a leak

I have sailed my newly acquired 79 DS II twice now, and both times the bilge has filled with water. The first time, there was a good deal of water in there, the second not so much, but I wasn't out on the water but for about an hour and a half. After the first time I sailed and discovered the water, I read different posts on the forum and decided to use 3M marine sealant to seal the CB bolt. I figured this is where the water was coming from. Then, about 30 minutes into my next outing, I looked down below and no water. I thought the problem was solved. However, when I got the boat home, I had to get the pump back out and get rid of the unwanted water.
After I pumped the water out, I went to take the trailer off of the truck and heard water in the bow under the cuddy. I picked the trailer up to try and get the water to move to the back of the boat, but didn't have any luck. Is this possible? or did the water just move before I could get to it.
Could it be that the water was still in the boat from the outing before? and just hiding from the only place I can reach with my pump, which is right around the CB trunk?
Should I install a bilge drain to get the water out?
thanks
After I pumped the water out, I went to take the trailer off of the truck and heard water in the bow under the cuddy. I picked the trailer up to try and get the water to move to the back of the boat, but didn't have any luck. Is this possible? or did the water just move before I could get to it.
Could it be that the water was still in the boat from the outing before? and just hiding from the only place I can reach with my pump, which is right around the CB trunk?
Should I install a bilge drain to get the water out?
thanks