Here are the ones I thought would work. A rotation that includes the possibilities of Anaheim, Atlanta, Atlantic City, Chicago, Cleveland, Dallas, Las Vegas, and Orlando would get reasonable churn in material and local customers, and it would mostly be in highly accessible transport hubs.
Las Vegas
I'm only looking at the LVCC since I'm lazy.
There are two spaces around 600ksf, plus another that's basically two 450ksf spaces stacked one on top of another.
Orlando
The OCCC has the most straight-line space of any. Halls A and B are 640ksf, tack on Hall C for another 100ksf+, and if that's not enough then Hall D has another 150ksf+, as does the adjoining Hall E should what's listed so far be inadequate.
Atlanta
Please. Just please. Get it over with already.
Atlanta has the most contiguous space, if in a horseshoe shape. Hall B has a bit over 600ksf, Hall C has over 400ksf, and the B/C connector has enough ksf to push it past Orlando for the most space.
Dallas
The KBH has about 710ksf.
Anaheim
I'm throwing this one in for good measure.
Halls A-D make for 665ksf+, and Hall E is another 140ksf nearby that can be used.
Philadelphia and Houston are closer to 500ksf, which after experiencing the crush load in 2021, I have little desire to be in a facility where every table is 2-3 collectors deep.