Thank you to everyone who's posted on here! Overview of what I did when I went out there day: Usually I bring grain out with me because Scout is completely food driven, he'd probably do a headstand to get his yummy sweet feed, but I decide to start feeding him in the area I work him so he would hopefully come to me when it starts to get colder out, so I didn't bring it with me today. Once he saw me, he happily came up to me and stuffed his head in the halter (Probably knowing sweet feed follows the halter- always). I did some yeilding exercises with him while he was still in the herd. Pressure on his nose to back up, side stepping, yeilding his hind quarters and walking large circles with him a solid 4 feet away from me. I then lead him through the herd where he was perfectly at ease, though clearly curious as to why he hadn't been fed yet. After we were about 10 feet from the closest horse, he began to act out. I proceded to repeat the same exercises I had done with him while we were with the other horses. He calmed down some, and we continued until we got to a wood pile. He was skiddish and on high alert, almost to the point of being completely unmanagable, however after 10-15 circles, he chilled out a little. I decided to lead from his right side so I was putting myself between him and the wood pile (I don't know if this is what I was supposed to do, but it worked) he immediatly calmed down and while he was still pretty nervous, followed me willingly and respected my space afterwards. One of the BO's sons was working with some sort of super loud lifty thing (sorry, I have no idea what it actually was, just that it was loud and really bothering Scout) close to the flat area we do most of our ground work. While he worked, I decided to prove to Scout that the machine was harmless and after probably 20 minutes of walking circles, making each one slightly larger, Scout was walking past the machine like it was nothing. His head was down and when the BO's son turned it off, Scout even tried to nudge it. After that we spent about 10 more minutes working on simple stuff he already knows and he was a complete dream. I let him go after that and for the first time in a really long time, he stayed at the gate and watched as I put away all the tools we'd been using. He seemed much calmer and more like his usual self, but will it take nearly 45 minutes to convince him i'll keep him safe tomorrow? Isolation isn't an option and the other 9 horses have different owners so I can't exactly do much with them.