I use a portable electric corral for Dream. It was relatively inexpensive (just shop around.. some are insanely high priced.. I got my posts on sale at a local horsey outlet and the electric tape and charger at tractor supply).
Do make sure whatever you use, you practice at home with it first, esp if you pic electric and your horse has never experienced that before. I can remember seeing a horse flee thru camp once (trailing various bits of electric tape), that had never been in electric. He got zapped, ran backwards, got zapped and then just bolted blindly, taking the fence with him in his panic. Not good.