I live around the gulfport area but am not opposed to traveling for a good groomer. Those whom I have asked say pet smart. When I stopped to ask them about it they acted like they had no clue how to groom a maltese.
I wouldn't use Petsmart. Most people don't have good luck there. There is a lady who used to be a member on this forum who lives in your area. You might PM MsMagnolia. I don't know if she's still a member or not. I'm pretty sure that was her name. Good luck!
I just got home from spending the winter in Gulfport. I had a great groomer and I got her name from another member (MsMagnolia). Robin works for a vet and does the grooming on the side. She comes to your house which I loved and she's a very nice person. I'll send you a PM with her number.