Remember to bring bedding! Lots and lots of extra bedding! Keep the bedding deep and clean –*pick it out and remove wet bedding twice daily, if possible! Cedar bedding is really nice because fleas and lice don't live in it.
Make sure you mount more than one water bucket in your horse's stall, and refill them constantly. Always have cool, clean water available. If your horse doesn't drink well at shows, bringing a sweetener or some sort of electrolyte (whatever you usually do – don't make the World Show the experimental show) to help.
Bring an assortment of blankets, so that you're prepared no matter what the weather turns out to be.
Make sure your horse is out of his stall as much as possible! They can get wound up, nervous, or bored in their stall. If there's any possible place to take him to graze, take him there! Take him for leisurely hand walks often – he'll appreciate it.
Don't let your horse drink from "community" water troughs. Your is inevitably going to need to drink while you're riding, so have someone keep a clean bucket filled with water so that when he's thirsty, he can safely drink out of his own bucket.
Bring extras of EVERYTHING! There is nothing worse than getting to a show and not having what you need. Make multiple lists, have horse people look over and suggest things, check... double check! And even if you think you won't need it –*you will! So bring it!
Be nice to everyone(: Make friends!
Good luck! You have to let us know how it goes!
The hills were bathed in moonlight, the shadows not so stark;
Silver light reflected off his brown hide as he held me in the dark
– I love you, Mudpie!