1. Coast Pistol and Rifle Club, in Wool Market, Ms. (my favorite) Membership is $200.00/yr. Trap/skeet is $2.00/ round. $5.00/rd for guests. All types of rifle/pistol competitions, also. Max. rifle range is 300 yd. Access is by membership pass card, 365 days/yr. Check their website for all details.
2. Florida Parish Gun Club in Amite, La. Fees unknown.
3. Previously called Hunter's Run Gun Club, in Port Allen, La., just south of Baton Rouge. Fees unknown.
Sherburne WMA at Krotz Springs has a range you can use for free (your tax dollars already paid). I’ve never used the skeet range yet, but the rifle and pistol ranges are decent. Maybe not the best, but it is public land, so...