I have planted them a few times...but have never really had any deer action in them. It is also true though that I have planted them very near my cabin and grain bins...so the deers may have shied away just due to the close proximity to human activity and buildings. I plant them for the birds...food and winter cover...and have had good results with tilling the soil, broadcasting and then lightly dragging the ground. I'll say that I cultipacked too, but am not 100% on that. I don't remember my planting rate, but I am pretty sure that I wasn't that scientific...load up the bag seeder and start walking.
I am sure you could drill them too, I just didn't have a drill myself until 1-1/2 years ago. If I do them this year, I will drill them. Somewhere in late August though...be ready for a MASSIVE goldfinch invasion. I could not believe how many migrating goldfinches would be in those sunflower plots...just incredible AND very, very beautiful to see a "wave" of gold flying out of the field as you approach it.