Definitely depends on the crowds, but I’d say if you really get there on time, that list should not be ANY sort of issue. Usually people TRY to get there on time, but life happens. So the people that DO get there on time, understand what can be done.
I’d really ask myself how much you wanted to do “Barnstormer” more than anything else. I’d assume Barnstormer would be better for later. AM time is VERY precious. Barnstormer is a kiddie street carnival coaster. It is what it is, and it has a place, but unless you know what you are in for with it, you might be disappointed. Kids might be disappointed, too. Just sayin’.