You can still write to him, I'm sure he'd love to keep hearing from you. And a little later they may be moved back up to their camp and have room for things again. I think when they are 'dropped' from AS because of no contact you aren't supposed to keep sending mail because they don't know what happened, but in this case we do know it's just a lack of space.
I was sending to him while he was with the 2nd and then after his transfer, I'm going to keep writing to him and the others as well. And unless they say otherwise, I'll keep sending to my other contact. I think there were just multiple contacts and Michael especially never wanted ALOT of stuff sent, just some basics that he listed.
I'll miss his posts and pictures though, Anita