You could order your trailer with the stalls configured to face the back, but with their heads still on the left side of the trailer.  I've seen this setup with a ramp on the right at the first stall to load horses, then they are just lead out the back.

I have doors on both sides of my mid-tack and will use the door opposite my LQ door if its more convenient, depending on how I am parked and who my neighbors are. 

The reason that horses are hauled with their heads on the driver side is because horses are heavier in their front end. Roads are built with a slight crown down the center - in fact, semi-trucks are set up with this in mind. I remember when the tires on my ex's semi, driver side front and drive wheels, were wearing terribly - the alignment was done incorrectly to compensate for this crown. Semi's are tricky - because it depends on whether you do local driving or interstate (multi lane highways are less crowned than 2 lane roads).

If you expect to sell this trailer anytime in the future, you would be better off keeping the horses in a traditional slant arrangement, and then instead of backing into campsites, pull in and then back out (or vice-versa). Perhaps you can arrange to have your hookups/drains on the predominant campside?

The majority of my friends who camp, have the LQ door on the short wall, driver's side. It actually works well for us as those of us with pass side doors, will face those with driver side doors - and that frames our campsites. We camp where there are no elec/water/dump hookups. There was one time when 3 rigs formed a "U" and gave us lots of privacy from others.

hope this helps you make a decision that works best for you.

My trailer is a 3 horse slant with the horses heads to the passenger/curb/ditch side, 10 foot short wall.  

Done this way because every where I go, I park in a certain spot almost every time.  Used to tying the horses and saddling on the passenger side.  In order to put the rear tack close to where I am saddling with tack door on the passenger side instead of the rear, we had to flip slant direction.  Just FYI, no rear door on tack because walking up and down ramp with saddles and stuff is a pain.  The living quarters door is on the passenger side which is my short wall due to the opposite slant direction. 

Another reason was because I feel safer for the head to be curb side.  This is just my opinion, so some of you dont get your panties in a wad.  Have seen road debris fly up from oncoming cars, into windows and even through the screens and hit horses in the face.  Have seen a trailer swiped down the side from an oncoming car and have seen one hit on the interstate by a car next to it swerving.  I would think the butt could take a beating better than the head.  I ride on cows and my horses take getting hit in the butt ok but when something comes close to hitting their face they dont care that much for it and they are usually kinda headshy for a while after.  

I love the configuration because I never had to change the way I was used to tying and tacking up.  The horses kinda looked at me funny the first time when they went right instead of left but no problems.   They seem to ride the same and no pull to either side with weight issues(one gelding is a big boy at around 1400 lbs). 

If you want you can email me at dwnsouth@cox.net and I can send you pics to show what it looks like.  Oh, the trailer company did not charge me anything to change direction of slants. 

i don't do any camping, but I have a Jamco with the GN access door on the right (passenger) side. The horse's ride with their heads facing the drivers side in a traditional slant load arrangement. I like having the GN access door on the curbside because if I was ever to break down, etc I could easily access this area for repair kit, etc without having semis whiz right by me on the interstate. I can see where this would take up some of the usable space on the long wall if you were camping, but it seems much safer for interstate travel.

On the other hand, wasn't there some research done by UC Davis that stated horses haul better facing backwards or in a reverse slant configuration? It seems to me that there were a couple of years where the reverse slant was a huge selling point and I believe it coincided with the research performed at UC Davis.

Just my 2cents!