Driving directions for all GPAA claims is listed in the printed Mining guide. Please make sure to verify the claims with the Online Mining Guide.
Unfortunately, Pima County had a number of claims closed by the BLM after the latest edition of the printed GPAA Mining Guide due to the claim owners not being able to meet several requirements.
The best method is to use the Online Mining guide to verify the claims. If they are in the book and not online, those claims are closed. If you see claims in the Online Mining Guide and not in the printed Mining Guide, they are new claims.
From the Online Mining Guide and if you have a smart phone, you can send the driving directions from the Ingress or Center of Claim (my preferred method) directly to your phone. From a computer you can download and print the turn-by-turn directions as well.
Age in not an issue, I have been talking to a member that turned 82 this year, bought his first dredge and is heading out to the gold country in a few states before winter hits and is planning his 2023 mining season.
Let us know how you do out there.