Louisiana Archaeological Society
It costs only $20 annually for regular membership and $12 for students.
You don't have to be an anthropologist. Anyone with an interest in history, art, other cultures, etc., will enjoy L.A.S. membership. You'll get cool newsletters filled with archaeological site reports, maps, articles, and info about where to apply as a volunteer on various anthropological projects and archaeological digs. You'll also get invitations to meetings where you'll get to rub shoulders with cool folks like John Lee Doughty and Jon Lee Gibson while we listen to experts give lectures on all kinds of cool stuff.
Tell him Junior sent you.