Ditto Trakhener. Under an hour, fully tacked. Over an hour, not. Unless the horse is young/inexperienced, in which case I WILL tack for a longer van ride as it is a pain in the butt, for me and the horse, to try and tack while they’re dancing around, inattentive. Far far far safer to do it at home.
Stock trailer, too, so mine travel loose (if just one per compartment) or tied side by side with plenty of wiggle room.
Halters over bridles, sheet or blanket over saddle, if cool/cold.
Girth snug not tight. Might need to reset a saddle at hte meet. Not a big deal.
I hate scurrying around trying to tack a fidgetty horse, and cringe when I see people trying to do it.
The fear of shipping tacked is, in my opinion, misplaced, esp. given the fidgetty alternative, that I feel is far more unsettling to a horse.
I usually ship home tacked, too, for shorter distances (if there is NOT a breakfast). I take off bridle if having a quick drink, all the tack if going in for a bite, and all tack off plus groom thoroughly (there) if going in for a proper meal.