Good question. We had a park reservation for AK(started tour there), went to DHS and then MK. We were in MK at 1:00 when we got the BG. We didn't enter through the main gate at any park, but our bands were scanned at some point with an IPad type of device. I don't remember where. I don't think it was AK. Maybe it was DHS after he had secured our park reservation there? That actually would make sense.
Early in the tour we were saying how we were going to try for ROTR later in the week. The guide asked for our email addresses (two families, so two email addresses) and then said he was going to "try something." I had no idea what he was doing.
Later he told us he got us all park reservations at DHS. I'm assuming that was what he needed the addresses for.