I’ve seen it in Chicago (assuming it’s the same exhibition) and you’ll want to go on a relatively quiet day (i.e., sometime in the middle of its run, rather than early or late).
I read this exhibit was at the Field Museum a year or two ago so it must be the one you saw. The exhibit went on to London and now is back in the U.S. at Dallas and Atlanta. We are going the Tuesday after Christmas. The exhibit opened in October and runs until May so maybe we picked a good time. As long as we don’t get one of those freak Texas ice storms I should be good to go. I missed the first Dallas tour years ago and always regretted it. Did anything in particular blow you away?