Lilly - I haven't actually built one of the reflectors, but I thought it was a good idea if you needed completely weather-proof lights.
Here in Oregon, I've had success with the setup that Brad Green mentions above: a compact fluorescent black light screwed into a metal reflector clamp fixture. It's easy enough to clamp the light wherever you want, and the reflector keeps the output directed exactly where you need it to go.
In the woods, I'd suggest having the lamps clamped above, like on lower tree limbs if possible, to either side of the pathway. Use as many as you need along the path to be sure each prop or prop area is lit well. Each flood can cover about a twelve-foot wide area at a distance of about twelve feet.