I have Military Buddies that did exactly what you are doing, and they couldn't make a living at it.
They were military Jungle (Mayflower), SERE, and 'Special Forces' and the insurance was so incredibly high they simply would have to charge too much.
You might want to change your focus a little.
Instead of 'Survival', consider 'Outward Bound' type program or Corporate Team Building Exercises.
That pays BIG money and the Insurance/bonding is MUCH less! (doesn't have the word 'Survival' in it!)
Offer
"Desert Navigation & LIVING Skills",
"Basic Desert LIVING Skills",
"Aboriginal LIVING Skills" classes.
(you say 'Indian' and I'll want to punch you in the nose!)
To say 'Survival' means there is a distinct possibility that one will NOT Survive, and that makes insurance companies gun shy!