Is Dennis Port Cape Cod a good place to vacation with small children?

I'm looking into a Cape Cod vacation, and have gotten great tips thanks to yahoo answers. I found a great hotel in Dennis Port. Since I don't know a thing about this area I'd like to know if this is a good location for young kids (2 and 6 year old). I really want to be near a warm, calm beach with few waves (more like a bay) so my kids can swim safely. Does Dennis Port suit my needs? If not can anyone tell me the names of other towns in cape Cod where the water is warm and calm, and are also family friendly? Thanks!!!