I use a Hi-Tie system. Yes, it’s tied to the trailer but not a hard tie like being tied to a metal hook on the trailer itself. Gives about the same amount of turn-around room as a standard stall. Bonus, it’s very very easy to set up once you get to camp. Essentially the same benefits as a high-tie but you don’t need trees.
Here’a a link to some information: http://www.easycareinc.com/Other_Products/hitie.aspx
They’re not cheap but when you consider the ease and the permanence I think it’s worth it. I had tried a lightweight corral system which my horse quickly learned how to lift off the ground and dismantle. On one ride I tried it with assorted reinforcements like bungees and ground stakes - I swear it took me longer to put the thing up and take it down than it took me to ride the 25 miles. I’m sure I was a source of amusement to other riders sitting around relaxing while I slaved over fencing.