Thanks for all the responses.... we're off to southern Colorado for an arrowhead hunt; We found a private ranch which welcomed us...for $$ of course. Had dinner reservations next week at the Inn of Glen Haven, just outside of Estes Park. We don't believe it is still there. Our cabin just west of Estes Park is gone...hope everyone is safe!
This mornings' WX channel expert calls the Colorado washout a " once in 1,001 years event "... Estimating 1 Billion $ damages. What Indians were living in Colorado 1,001 yrs ago
Searched intensively on Google for "Colorado" and "arrowhead hunting". Eventually found a location for surface hunting. (Private Ranch which leased out camping spaces) They had large areas for isolated arrowhead hunting but was covered with lots of rocks. Made it difficult. Did not find any "digs".