Last April we had the same situation while staying at WLV. We were told that the the bus runs begin 60 - 90 min. before park opening. We were at the bus stop at 7:00 and were picked up at 7:10. My brother & sister-in-law missed the bus & we were all very concerned that they would miss our breakfast reservation. But another bus came at 7:20 and they were able to meet up with us while we were in line at the turnstiles to get into AK. Please take time to admire the park while you are walking to Tusker House. It is not often that you get to see it so un-populated. Take advantage of the photo ops while there is no one around to walk into your frame too!