Does it have to be the week of 4th of July.
Probably insanely busy, and expensive, in most places!!!
Like 3 - 4 deep, shoulder to shoulder, on the beach.
In July, Southern Florida might be cheaper for a hotel/resort...
That is a lower season, because it is HOT!!!!
I was going to recommend the Panhandle... the NorthWest FL 'Emerald Coast'.
We love this area.
But, in July, it will be so packed!!!
And, very hot as well.
And, it can be expensive, since it is high-season.
We travel to Destin, off-season.
Will be there in a few weeks, in May.
Beautiful beaches if there are no water quality issues with Seaweed.
White sand, nice water, but usually not as clear and blue as the Caribbean.
But, almost!
Depending on what they are looking for, Ft Walton and/or Navarre would be more low-key.
But, maybe too low-key for a couple in their 20's????