I did a search but couldn't find an answer. I'll be going through SFO today, and I'm checking in 3 pcs (1P). Do I have to see a UA agent or can I use the skycap? (Until now, I've only checked in 3 pieces originating in non-US airports and traveling internationally, so by default I HAD to see an agent) I've never used a skycap before, and I'm assuming that they don't know about *G allowances... Thanks for your help!!