I have all the archives for UFWDA and the ULAF. I also received a box or two from Harold Brown's niece last year upon the passing of her Aunt, Kay Brown (Harold's wife). I have all the old certificate of incorporation from the various states we've incorporated. All tolled, I have about 30 boxes in my possession.
Here is what I know for sure:
1976 - Initial meeting of the minds in Toledo, OH
1977 - Second meeting to establish by-laws, articles of incorporation, etc.in Golden, CO
1978 – March 17,1978, date of incorporation in the state of OR – United Four Wheel Drive Associations (with an “s”).
2001 – UFWDA celebrated 25th anniversary (AGM held in Farmington, NM, Joyce Hillson was meeting chair for 25th anniversary celebration, with newly designed anniversary logo with 1976 – 2001 included.)
2006 - UFWDA celebrated 30th anniversary (Oak Ridge, TN)