This one is more complicated since there is more information on the QR code so there's more to think about but it shouldn't be that bad. LOL 
The first two QR codes will give you the coordinates for the next stage, a hint where to look and part of a phrase. The last QR code will give you the last part of the phrase. Once you get all three parts, enter the phrase into the checker on this cache page to get the final coordinates and a hide hint. Easy. LOL
I have no clue how long the waypoints and the final will hold up in bad weather. They're not durable but I wanted to use these things I found at the store so much. Once they start to break down, I'll replace with better stuff. 
FTF goes to ShadesOfGray, TheTilleyHat and ttomw! Way to go! 
You can validate your puzzle solution with
certitude.