Beach/lake minimoon in October?

Looking for some easy ideas (we live in the Baltimore area) for a 3-4 day minimoon after our October wedding. Willing to fly like 2 hours, drive like 3ish. Something where we can just decompress and lay on a beach or by a lake.

Our proper honeymoon will be the following summer, but we really want to do something super relaxing and warm right after (and not break the bank)

Thanks in advance 🙂