My Arab was a big spooky, scaredy cat on trails for a while. An obstacle course really helped us. It got him thinking about new things instead of reacting. I walked him through it the first time, and then we would ride through it every time we were about to go on a trail. It just got him in the right mind set.
I would switch things around so it always seemed new. A path of tires can be rearranged easily. A tarp can be made smaller and larger and move it around. Cones on their sides. All kinds of things laying around the barn can be turned into obstacles.
I don't know what your new place will be like, but maybe you could set up a few to go through before a trail ride and then (like others have said) find obstacles on the trails to make her go through. A jumble of limbs, around trees, back and forth through puddles - anything to get her thinking instead of reacting.
That worked for me and my big coward. ;)