You would also need to have PRVs anyways, because anything above about 700psi (900 if you are pushing it) is unusable/unsafe to use by the actual snowmakers and equipment. You also run soft 2" "fire" hose from a hydrant to a gun, and those are not rated for those pressures and the nozzles of the snow guns would wear out super quick as well (and the internal plumbing of the gun would probably blow up too).
You'd generally have a max of about 900 PSI and ideally much lower as most of these pipes are relatively old, have no maintenance (until they blow up and a quick patch is made) and were welded up by "Bob the maintenance guy"!
I suppose you could design a brand new system to be capable of such pressures when run in "generation" mode and still have some PRVs to keep it at a usable pressure during snowmaking operations.