Congrats on the purchase.. Newport 30 is a decent boat. You will enjoy her. And the life.
I lived on a Grampian 26 before I met my now family. The summer after they came into my life we spent 50 days out and about the Canadian west coast. 4 of us - similar to the folks on the Catalina above. We loved it so much we bought Stone Age and have been sailing ever since.
Re: insulation. We used a paint additive to help insulate Stone Age. Working extremely well.
Just add the "bubbles" to paint and apply as normal. Kind of like wrapping your boat in a vacuum flask. It does leave a kind of texture, but not too bad. I'd use it inside. Also maybe under non skid on deck too. It's great stuff.
HY-TECH Insulating paint and insulating house paint additive DIY insulation solutions
Capt'n John & Crew