My first question would be, how do you know it is A. baergi? I'm assumign it was found in AR, right? It is most likely to be A. hentzi as they are the most common tarantula from that area.
A. baergi hasn't even been proven to exist in AR yet. Much work still needs to be done in that area. See "What's Next" here for more info:
http://www.naturalheritage.com/citizen-science/tarantula/results.asp
OK, now aside from all that. A. hentzi are the calmest tamest and easiest to handle species that I have ever come into contact with. Even if you do have A. baergi, it is likely from the same hentzi complex and should be similar in behaviors and temperments.
Care for these just like you would a G. rosea or any other desert dwelling terrestrial species. Give them a deep dry substrate, a hide and a waterdish and you're set!
Good luck with whatever species you have!
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KJ Vezino
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