Generally speaking, an hour should be enough time for you to get from AK to Sanaa, but your plan could have bumps like the one above. Occasionally a bus is nowhere to be seen for whatever reason (this is the case at any park and any resort) which could delay your plans. Another possible scenario is what if you get in your FP+ line at 10:20am but don't get finished with your meet & greet until 11am (again for whatever reason; I don't know how long lines can be for meet & greets)...well, by the time your party made it out of the park and hopped on an AKL bus, you definitely wouldn't make it in time to your ADR. Likely things will work out fine for you and you'll make it just fine to Sanaa, but there is definitely a realistic possibility that you might be late if there isn't a bus sitting there waiting for you when you get in line or arriving shortly after.