Ideas for beach camping vacation

Hey I’m a 28M currently living in the mountains of Colorado and looking for ideas for a two week vacation in early December to somewhere quiet with good beaches and options for camping.

I was looking into the Virgin Islands, both US and British as a neat island hopping adventure. There’s a handful of beach campsites that look great.

I was just wondering if anyone had ideas or suggestions for other places like that? Not looking to do much except snorkel, wander around some islands and enjoy some good rum.

The cheaper the better but it’s been a while since I splurged so I can pony up a little bit.