I have. It shown in a while but thus is what I will be doing when I get my little guy out in the showing world!
Clean all tack, blankets, gather things up to load in the trailer, make sure I have an extra lead rope and halter, an extra whip and chain and triple check everything in my first aid kit, if you check slot hopefully you don't have to use it! I brink extra clothes for myself.
I have a grooming tote, a side ring tote (rags, fly seals and brush and hair brush....and treats and a water bottle) lol bathing tote with all bathing gear. For the Summer I bring fly sheets and lit sheet for the cooler nights
For fall or early spring, a fleece cooler and stable blanket
I have a sign with my emergency info for horse and I
Things I pack for stable/tack room
Stall guard, two water buckets, extra clips, hanging hooks, a rug for the tack room, small table and chairs, a erase board to have in the tack room for my daily class schedule, a tub for stable wraps, a tub for blankets, a laundry basket for city pads, polos, boots and blankets. Also a lock for my tack room stall for night time :)
That's all I can think of