I'm "only" 2.5 hours away, but factoring in all the driving, prep time, loading and unloading plus deciding whether to unload the trailer between shows makes it a royal PITA.
I've been a vendor at both shows but between this drama and covid, I'm not going to either one this year.
I'm pretty sure there's more than enough days available in non-stifling humidity months to have both shows not a week apart.
Heck, having them on the same day would even be a better solution as you can almost walk between venues.