Good Evening, Janet,

1--Rock solid tripod
2--Cable release (locking, unless your shutter has a "T" setting)
3--flashlight
4--watch
5--warm clothes
6--black card (Hold in front of lens as shutter is tripped, especially with SLR; wait for vibrations to subside; remove card for exposure.)
7--T-Max 100 or Acros instead of Tri-X for better reciprocity response
8--soft-working developer (Technidol, if you can find any)
9--High boredom tolerance as minutes-long exposures take place
10--Expectation that future trips with exposure/development fine-tuning will be required.

Good luck, and have fun.

Konical