Don,
I don't know about your son's exact situation or what his branch or MOS is but I would bet once he gets in country he will be in contact with you guys. My husband just returned from a deployment and while he was in transit I didn't know where he was or any details but once he was in country I heard from him fairly regular. Deployments are so hard on the families, harder than on the soldier my husband says. I''ll pray your son is safe while deployed and that he'll return home to you all safe.
God bless,
Shannon
Jackson, MS