Most of the big places didn't allow pets at all. Make sure you check out all the details before you make the reservation. Dogs are not allowed on certain stretches of beach at certain times of day and during certain times of the year. I have to recommend the The Sportsman Inn. It had strict rules, but I was very glad of them.
All dogs have to be on a leash at all times.
There are a couple grassy islands in the parking lot for walking the dog on. There are video cameras to ensure this. You cannot leave a barking dog in the room, etc. I was glad to find the place was quiet and very clean. It was off season, they seemed pretty full, and everyone I met had a dog.