Thanks for sharing your climbs. I am working towards climbing all of the 12ers. I have Borah and Lost River Mountain under my belt so far and this video has me very excited to climb Diamond Peak!
To be honest, Diamond is my favorite of the 12-ers. I have climbed them all (in both summer and winter). If you would like advice, please do not hesitate to reach out to me.
A regular car can make it if you drive very carefully. An AWD car with a little more clearance (Subaru) would do much better. I drove a Rav4 and the roads were simple.