We have stayed at 2 near the head of the gulf. Ocean Marina Pattaya, well seviced and expensive, and Racer Marina Hua Hin, its being upgraded facilities are clean and being rebuilt. Half the rate. Both have good access to Bangkok. We Would choose Hua Hin if we wanted to leave the boat and do some land travel.
I've learned so much from my mistakes I'm thinking of making a few more.