Thank you lanejudy...I didn't see that thread and it does help. Sounds like AC is the determining factor for 'inside' - Slinky Dog was a good example I was curious about since it is under roof, but not under AC. I will use the AC reference as a guide and bring masks accordingly for that. Sounds like AK I will likely not have many occasions to mask as I tend not to do the rides with indoor components or shows very much. MK will be a high-mask usage day. That definitely helps me plan.
And thank you crazy for the additional on-site information!