I fully agree with Peter4 about Hua Hin, having been there several times.

I don't have a problem with taking the limo services that are available at the airport, although I've never had a car from a Hua Hin hotel meet me. The airport limos have always been fine.

The Marriott and Hyatt (better than the Marriott IMO but further from the center) in Hua Hin are OK, but I suggest you check out the Sofitel.

Also, we always eat at seafood restaurants which are on piers that extend out into the water. Not fancy, by any means, but great Thai seafood. Last year, at one of them, one of the Thai princesses and her entourage were there at the same time.