Motion activated shutter release + strobes?

So I got a panasonic GH4 recently. Really loving this so far. I would like to take some night time action shots with the mountain bikes. Main thing is that I almost always ride alone and don't know anyone who wants to go and session the same jump for 6 hours in the middle of the night.

I actually have almost always worked alone when in school doing projects or recently. I do my best work that way.

Anyway, where to start with quality motion sensing shutter release, strobes/lights (I plan to get a small generator to take into the field), etc? Something that allows for continuous shutter release not just a single frame.