It's a shame to have to say this, but you know better than any of us dudes that a lone female, at night, secluded, or even not so secluded spot? It's always gonna be a crap shoot. There's no one you can ask to come along?
If you choose to risk it going solo, Always be aware of who and what's around you. It's real easy to be caught unaware when all your attention is on your viewfinder and composing the shot.
Men aren't immune either. As a photographer myself, I've been in a few sketchy situations alone in the woods with my gear. Scariest was in NorCal. Couple a boonies rednecks thought I might be CAMP or DEA with my camo and long lenses trying to catch pot growers.
All I could think of was Ned Beattie in Deliverance!!!!