I'm thinking Yes this year. I have an interesting perspective as I fly the Bell 47 tour helicopters. We start flying on Sunday with training on Sat. Over the past few years we have noticed a trend of people getting there earlier and earlier every year. I suspect with the year off people are anxious to get out and get to AirVenture.
As far as a Tuesday arrival, that is usually the point where everything is getting full. The good news is homebuilts are never turned away. Also, a few years ago they added another area next to the traditional HBC.
So, I think it will fill but you'll be fine. Get there on Monday so you can attend the RV Social Monday night.