With a 2 strobe set up you can do quite a lot with a DSLR. I tend to back light on full power of the strobe and set the iso to as low as I can get away with. I'll then set the aperture (This one is iso 125, aperture f10) then adjust the front lighting and position to suit. Here I had a flash down the passage to the right on the floor facing back toward the models back. Front flash hand held in my left hand high and slightly angled down towards the formations and models face.
A slightly different set up, this time one flash held directly above pointing down and one from the left side. Set up with the top flash determining the iso and aperture settings. (This one iso 64, aperture f22)
Sometimes I think a silhouette shot works fab. This one has two strobes behind the model held at waist height, each slightly angled left and right. (Settings iso 800, aperture f5.6)
All my strobe shots tend to be at 1/125 shutter speed, unless I'm using mixed light sources. This gives the advantage that shots can be hand held with no tripod needed. I use back button single point focus and only change focus point if I, or the subject change distance. Once the lighting is set up I tend to take the shot from a few angles to see what works best. If you have a decent MP range then overshoot wider than you want the shot, this will mean you can crop in and get rid of soft/out of focus edges if you have them. As the guys have said, protecting the gear using peli cases or Daren drums is key. Cloths to dry hands of flash gun holders, or to wipe strobes that have been positioned on muddy rocks (Remembering not to put damp cloths in with the camera after use), disposable tissues to wipe lenses etc.
Practice in dry caves to hone your shots so you don't feel rushed by people getting cold and wet. Be appreciative of people who assist you and give them positive feedback whilst taking the photos.
If you are that way inclined shoot in raw and post process. You'll always get better results editing your own photos than allowing the camera to point and shoot, but you can only polish a turd so much, so get the shot as good as you can in camera!
Hope that helps.