Nine In, Nine Out, Now What?

Nine months gestating inside, nine months gestating outside...and now that my baby is nine months old, what does that mean?
Do I stop wearing him? He's certainly heavy enough at 20lbs that I can't carry him as easily as I used to. He loves to crawl and stand, and is trying to walk, so doesn't need me for mobility as much as he used to. But he's still such a baby! I still love to cuddle him and hold him, but he often wiggles and squirms out of my grasp. Of course, when he's tired, or hurt, or scared, he still wants to be with me. Inevitably, when I really need to set him down (to make dinner or go to the bathroom) he desperately wants to be held.
For halloween, we are going as kangaroo and joey...he likes being in my pouch, so might as well play that up, right? After all, it probably won't last much longer.
I guess he's done with his external gestation, but he's not done being my baby.