Hi every one, I'm new to this forum and it sounds like thiers a lot of good information posted.
I just wanted to put my experence and thought in this topic.
I've had rideing and have raceing quarter horses and have unloaded both ways but if the area I'm unloading at is a little to steep of a drop I make sure to back them out.
For two reasons one they might jump & slip or land wrong and injure thier knees, ankle or shoulder its happen to me.
I'll look for a spot where the back of the trailer will be low to the ground so if they want to unload forward or backward its no big deal.
If the back of your trailer door folds down then I would think its a non-issue.
Hope some of this helps & good luck.