Stuart MacLeod, from British magician duo Barry & Stuart, was the technical advisor on the magic tricks and taught David Boreanaz how to do them.
When the bikers are at the top of the hill, the sign next to them indicates they are in the Manassas National Battlefield near the First Manassas Loop Trail. When Bones says they have a case, she says it's in the national park near Gainesville, Virginia. Manassas Battlefield's First Manassas Loop Trail is on the opposite side of the park from Gainesville.