Okay, so assuming we register in time, i wanted to take my 3.5 year old paint to the APHA world show. We live in Cali, he's boarded in Portola Valley. He trailers fine, but I wanted to know what would make his trip more comfortable?
so like how long can you trailer for in between stops/how many hours can you trailer a day
should I bring my own water from the ranch? Enough for the trip, or the whole show?
Are there places along the way where you can rest your horse/how much do they cost?
And then what kind of boots should I trailer in? Personally I like trailering in elites or legacies since they offer support, but for a long trip would trailer boots be better, even if it's hot outside?
Any other tips are appreciated too :)

Sorry for all the questions, thank you!

It can be quite a drive. It's 10 hours for me and we do it all at once. We do not feed hay for the little drives but for anything over 8 hours we do. pets question and answers,www.5d2d.com

You should ideally stop every 4-6 hours. At those points you should offer water and a stretch if possible. It is often not safe to get them out so we often do not. My trainer did not make any stops on the 10 hour drive because she has never had one accept water and she does not like to get 7 horses out by herself. If you can stop every 5 hours then you can drive as long as you can stay awake.

There are boarding barns to put your horse up for the night. You will need a coggins form and sometimes health forms to board for the night. You have to set it up before hand and map out the barns that you want to stay at along your journey. The cost depends upon the barn.

Unless your horse has a history of not accepting show ground water I would not waste the space. Water can get very heavy and it a pain to take. You would need to bring a whole freaking water tower to supply water for the whole two weeks.

I really like to trailer in support boots. I trailer my mare in Professional's Choice splint boots and bell boots. The support is really what you're looking for on the rides. The heat should not be a worry as long as you have good ventilation.

I would bring him to the show about 3 days before you show. That way you have one day to let him rest and two days to let him get used to the place. The most I would do would be 5 days ahead of your first day. Otherwise it is just too much time gone. If he needs a full week to settle in then I'd do it. My mare is ready to go within a few days so more than 3 or 4 is just too much for me. However, you know your horse and you know how he performs.

Keep the divider up (assuming it's a slant load). The slant will help him keep his balance without jostling around and getting tired. If you don't have a slant I would borrow one. The straight loads are really not the best for the really long hauls.

Unless the directions listed a toll road there will be no restrictions on trailering across states. If you are to ever trailer through Kansas or Oklahoma you will have to stop and pay a toll. It takes at most 3 minutes and really isn't anything to worry about. It isn't that expensive usually. Now if you were going out of the country that would be a different story...

12 years riding/showing AQHA and APHA horses in local, 4-H, AQHA, and APHA shows. Competed in Hippology and Horse Bowl for 6 years. 2008 national champions Hippology team problem section. 2009 national Horse Bowl champions. 3rd place individual overall nationally, top individual in the state.

Well the truth is, you need shipping boots on or else polo wraps are going to fall down after a while. And yes bring your own water. No matter where the show. We have a huge, i am talking about HUGEEE!, water thing for our trailer to haul it in. I also know it takes like 15-20 to fill! Every 3-4 hours offer your horse water. Every 4-5 Hours take your horse out, flex him/her and walk around. pets question and answers,www.5d2d.com

How long is the show too?

7 years of showing. Like 8 years of riding horses. lots of experience

you could hire a Professional trailering service and the could take him non stop. they have boxes that are as big as a stall so he can lay down and pace a little.

TBH, unless you could find a small, quiet ranch, he would probably be fine for a non-stop trailer ride. Unloading a horse at a rest stop is a disaster waiting to happen since they're not built to suit horses. As long as you don't have a small, cramped trailer he should be fine.
Also, if your horse is valuable enough to take to the World Show, I would go for full-bodied protection gear. Leg guards, poll guard, tail wraps...etc.