Something those who want to include taxes and fees in the rate up front may want to consider is that Walton County is considering an additional 1% surtax for infrastructure. Nothing has been decided yet, but this would make the sales tax to the State of Florida 8%...and the bed tax would be 13%.
As one who long ago worked with bed tax collectors during a tax rate change and had quoted / rec'd payment in full and had to either go back and collect more or just eat it, might want to watch this closely and maybe mention to guests so that they don't think you are trying to gouge them.