We were at OKW the beginning of the month. We only took the bus to MK. We missed one bus and about 10 minutes later a second came. We saw a lot of other buses come by (2 epcot, 1 DTD/Typhoon Lagoon, 1 mgm, & 1 AK).
The morning wait seems short! It is the evening wait that seems sooooooo long! It must be those tired feet & whiny kids that make the wait excrutiating!!
We've taken the buses on other trips and have never had an issue. We've also taken the boat to DTD -- what a nice leisurely ride!
Enjoy your trip!!
P.S. We don't own at OKW, but my DH won't go anywhere else!!