Looking for Ideas

Hey, everyone! My fiance (24M) and I (22F) are getting married in May of 2020 and I'm at a loss trying to plan a honeymoon. I'm normally a plan-every-minute-and-second-of-vacation kind of person, to make sure we don't miss out on the activities, but I really feel like our honeymoon needs to be relaxing, so we're looking for a cool resort that we could hang out in for the majority of the vacation. I'm thinking we'd like all-inclusive.

My fiance hates flying, so somewhere within a 3-4 hour radius of Missouri, USA. I'm trying to fly out of St. Louis.

Where have you stayed? What did you like about it? What cool features are there?

Trying to keep total budget between $3000 and $4000.