Doug, there are two boatyards in Winterport, Mid Coast Marine (where I was last winter) is up the road a piece from Winterport Marine and is not neat and clean. I have heard good reports from customers that use Winterport Marine though and I'm glad you found it to your liking.
Midcoast Marine is probably one of the last true DIY yards in Maine, and is really rough around the edges. Long time customers there are very pleased with their relationship with the yard owner.
I had a mechanic friend come and do some work with me on Maia this spring, he has a small yard himself in Penobscot that caters to the smaller boats around the Brooksville/Castine area. He was surprised at the casual attitude around Midcoast Marine, it really is kinda the wild west of boatyards.
I was told to help myself to the use of the wood shop, band saw, planer, and table saws. Sure the shop is really a mess by any standard, but when I needed a little trim work piece I could go into the wood shop and work it myself.