When I was able to take Lacey on some actual trials she adored it. I let her go on a loose rein and choose where she wanted to walk. That's one thing that irritates the heck out of me when I ride on trails with other people, a lot of the time the other people will try to tell their horse where to walk, like as in not letting the horse go look over the edge if it wants to or whatever, as long as the horse is behaving itself, why not let it go where ever within boundaries you set? For instance I have boundaries with Lacey about how far ahead she can get from the other horses (she's a power walker) and about how far into either side of the trail/road she can go. As long as she stays with in those boundaries she can meander as much as she wants.
At home however Lacey doesn't seem to be as much of a fan of road riding. I think once we get out there and do it more she'll get better but currently it's a "OMG, I wanna go but I'm scared... Maybe my momma will get down from up there and save me if I act scared enough? But OMG I luuuuv being off property...I'm scared" sorta situation. So at home on the trail I make her work significantly harder since she has issues than I would if she was being calm, just to keep her mind on me and focus instead of spazzing.