I sure don't know much about Two Guns, have only visited it once and thought it pretty interesting but it seems there is precious little in the "historical record" on it.
The Zuni part is what is throwing everyone, as no mention of the Zuni has ever been in any of the Lost Adams stories in circulation. It would be a mistake to assume that there can't be any connection - just as SO many guys (and gals) only talk Apaches when referring to the Lost Dutchman, when there are possible connections with Navajo (same deal with the LAD - they pick up on Nana and the Apaches attack etc but miss that Nana told Adams that the canyon was originally Navajo, a branch of that tribe that is now darn near extinct, even has a Navajo name). Even Waltz and Weiser both assumed they had been attacked by Apaches, but the devil is in the details! There is no Apache memory of such an attack, what Apache ever left a new shirt after dispatching his enemy, why would the Apaches just let Weiser get away etc. Then check the dates and we find that not only the Apaches fought the Anglos, the Navajos also had a fairly long war. Navajos continued to make horse-stealing raids long
after the surrender of Manuelito in 1866. Didn't mean to get off-topic onto the LDM, just there are some parallels and when researching any lost treasure a fellow ought to at least check out other possibilities.
Good luck and good hunting amigo, you are wise NOT to trust strangers (and I sure wouldn't ever trust ME with the exact location of a lost mine!
) and I look forward to following your adventures. Sure wish I were in AZ, but when I give my word I don't like to let a friend down so will be here a while longer it seems. At least there are a few lost mines and treasures to hunt here in my 'backyard' too, or I really would go nuts fast.