Putting doors back on, any tips?

My father in law stopped over the other night, and I snagged him to help me put the doors back on my Cuda. I could get the top bolts in, but was not successful on the bottom hinge. Didn't mess with it long, he didn't have much time. The mount in the door kept sliding around. Didn't have much light to see.
Both mounts are on the car. Would it be easier to have one or both on the door instead?
I'm sure I can get it, but figured I'd ask the experts who've been there, done that.