I usually just don't drive the pin all way out, so it's still in place to drive back in for re-assembly.

FWIW - seems like half link chains stretch more and faster than regular chains. I also had a couple snap on me in pretty short order, which was surprising. I was running them on my bmx/dj bikes for awhile, but switched back when it came time to replace them. Currently liking the KMC K710 1/8" (not the 'superlight' version). It's one burly-ass chain.