IDK how much of a crowd it takes to make him anxious, but if you guys visit the parks pretty much ever, and he’s ok, I think you’ll be fine on Oahu. I mean we saw people and had to wait for a few people in front of us at some super touristy things like PH and for that “prime” photo spot on Diamond Head. And sometimes you’re jockeying for parking spots. But this isn’t Black Friday at the mall, Christmas Day at Magic Kingdom crowds were talking. And you can always just drive until you see a pretty spot without a crowd and stop there, if you aren’t dead-set on certain stuff. I could be wrong (I don’t know him), but I really think he’ll enjoy it.