IMHO, at this point the best thing would probably be to wipe it and start over fresh. I'd suspect the number of entries that are still accurate, still involved and willing to help is minimal at best.
Also, in an age of constant contact like we have, is such a thing still needed? Even if a rider doesn't have a smart phone, it only takes a phone call to one who does to get the word out via this forum, Facebook, etc?
(Not saying it's not, just putting it out for discussion and thought.)
My reason exactly for making the post, to start the discussion. The main reason I turned to VORTEX to try and help Bruce, is that we didn't know who was in the area, perhaps there is a better way to track member locations, and I agree the board and Facebook are good places to start when help is needed.