A couple of cairns as the camp might be a good idea. Clino can be done between any two point, in both directions. Several readings for each calibration is best. Points to Remember Compass must be flatish to get a meaningful reading. If your light affects the compass, then hold it away from the instrument when lighting it.
Degrees is the left hand scale on clinos.
Pick survey points so you can get your head in, and so you can see both ways as easily as possible. Sight from the other end of the leg, or put the compass behind it and look past the bolt. Have a separate front sheet without anything important on it to protect your actual survey notes. Draw extended sections in two directions for vertical cave, with plans where required. It is easiest if the drawer takes a spare compass for this in vertical work.