Trick with hip and ridge espically this time of year is take your time. Wait until the sun comes up, open the bundle and spread them out black side up to warm them up. Hold both sides and work them back and forth in an arc to get some curve bent into them rather than just bending them over the ridge. If you can put the bundle in inside overnight. Key is not to rush and you can get a good job.
Sure some guys will think I am crazy but had big grand manor job last year and took all the hips home and left them in my living room, then put in the truck as I needed then. 30 boxes at 62$ for 10’ I made sure they were dam good and pliable before installing.