I hunt alone a good bit, (besides the dog) and have acquired a good bit of NV gear over the years 2 dedicated NV scopes 2 PVS14's a hand held ls64 and Raytheon 1000, so I always have room for one or 2 more or my choice of systems some better than others for the situation at hand . more than 3 on coyotes and its a party and not conducive to fur on the ground as in noise, scent and other matters, Hogs I can get away with it for the most part. but two sets of eyes on thermal is better than one any day. before I hunt with a FNG I like to spend a little time with them on equipment rules and safety.
1. all guns are always loaded, and to be treated as such, (don't cover me or the dog with the muzzle at any time)
2. shoot only when I say so and confirmed that we are both on the same target and made positive Identification, additionally stop when I say so as I may see things they don't concerning safety.
3.check to make sure NV is off and announce before going white lights on and let others check and wait for a clear
additional things I go over are the importance of staying in their field of fire, sometimes I don't have time or want to talk while walking into a stand to explain that there is equipment to your 90* or livestock . taking out a new guy is work and a responsibility, if and when I do I normally have my brother who owns no NV gear but knows mine intimately to help tutor new guys and help keep and eye on them.
there have been several times I wish I had an extra set of eyes with me, and introducing someone to the dark side is always a thrill in itself