I've done a fair number of domestic MRs with pretty much 1-4 hours turn around. I love the expression on the agent's face when I check in at the gate or club - "How did you get past security?" I have had all my boarding passes (like 4 or 5) pop out when checking in since it's a non-overnight turn. One agent tried to keep the return passes - nope, hand those over please. I don't do true international MRs; if I leave the country, I stay at least one day.
Checked baggage? Are you kidding me? I never check bags, even when going to HNL for 2 weeks. "Why are you doing this?" is a question I have heard a couple of times. I respond "I have a meeting in XXX (and YYY, if necessary)" and that's enough.
