I mentioned this to my friend. The riverboat queue building is there still in the concept art (which helped me at least orient to where this will actually land) probably because it still thematically fits to Liberty Square and they'd just tear it down to build something similar anyway, but that...
BTMRR and the current riverboat loading building as diagnostic to the concept art, this is a hell of a lot of land. We'll perhaps be able to walk in a line-of-sight from BTMRR to HM.
My son was 12 and my daughter 15 and they both loved it. Like you I think about it all the time. One of the most impactful things I've done and very freeing.
Ours felt like 160% to be honest last May. It'd be interesting to do it with a smaller crowd. We've talked about it. At the finale I felt like the Atrium was unhealthily full.
We went in May last year and probably 85% of people at least dressed in-universe. That's not to say they all had backstories but there were very few Cubs hats for example.