LonelyStar: It could be his addict brain trying to manipulate you into letting him back home.
Take him up on it. Drive him there if he would like you to. I would caution against being his only ride for things. Recovery is his to tackle, and that includes asking other people in recovery for rides, or walking, or talking the bus.
My advice is to be on the lookout for, "Can I come home because ______." It's been pretty quick for him to hit a bottom, but you never know.