All the casinos are OK..our favorite in Biloxi is the Palace Casino. The only NON-SMOKING casino I have ever been in and the atmosphere is NICE.
All the casinos have good food at reasonable prices.
Might suggest a trip out to Ship Island if you have the time.
I think they have the old maritime museum up and operating and a trip there is a trip back in time to the old shrimp and oyster days.
LIving here, we tend to take things for granted...give me a clue as to what your interests (Other than S&W) are and I will see what I can come up with.
EDIT...I should have said that if you can arrange the time by all means go over to Stennis Space Center, almost in Louisiana, and visit the Space Museum Exhibit there. You will have to go Mon-Fri during normal work hours.....they are closed on week-ends.
This center used to test all rocket engines for the space craft BEFORE they were sent on over to Canaveral and launched....it is quite a place for space buffs.
Good Luck, God Bless