Crates normally aren't conceived as long-lasting items, but in this case (circus equipment, contains something precious), why not.
I have also noticed over the years that it's interesting to see which wood the crates and pallets are made from, depending on where they're from. We have several suppliers in Texas, their crates are always in Southern yellow pine. One California supplier sends us pallets made out of redwood. Around here pallets are pretty much always spruce.
Using hardwood for a crate struck me as... let's say, definitely nonstandard.