Why not just buy a can of glow in the dark spray paint? Wouldn't be as bright, but it gives a similar effect.
I could see some people buying those poles (look at those light up snowboards) but I really see no need for them as the hill is already lit up and they wouldn't throw enough light to matter. If you plan on putting the lights on the outside think about putting a clear coat or protective layer over top of them, probably not needed, but worth a thought.
For the lights might I suggest a flat el wire, I think they just call it el tape, but google will turn up plenty of results. The problem with most though is that they will take 4 AAA batteries and they don't even last that long- especially in the cold but at least they would be flat to the pole/ minimal and provide a constant strip of light over an led strip.