77 have you picked a place to stay? Do you mean Destin proper or sort of the whole of 30A?
My fam does a week at Rosemary Beach every summer. We usually try for late May or early June since as mentioned, it is hot AF now.
Rosemary is expensive, but it is all houses/condos/cottages so much better imo if you have kids since you will have a kitchen and dont have to rent multiple hotels. They also have a central on site rental agency/property management company, so if something goes wrong they can address it immediately, which you dont always get with a LL on VRBO.
Here is their rental site:
https://rosemarybeach.com/rentals/
Destin proper is super busy, we actually stayed in downtown Destin for 1 night before our week in May. Again, I like renting properties managed by property management companies rather than going straight to owner via VRBO, much less risk involved. This is a rental broker I have had good results with that has places in downtown Destin.
https://www.destinvacation.com/
If you want to go the hotel route, there is a Hilton San Destin that is this giant resort with restos golf etc, but it gets booked up for the summer pretty quickly.
Other places on 30A that are fine, but that I like less than Rosemary, is Watercolor, Alys Beach, and Seaside.
Good luck