I recommend you learning how to bunny hop onto & off curbs. Why do you need a driveway to get back on the road?

I don't follow your logic. You say the road is 40mph. If you're riding on the right lane, taking the lane, I'm assuming you'll be traveling less han 15mph (going up hill)??? That means, you'll have a bunch of cars slowing down behind you.

Once you crest the hill, those cars will still be behind you. Why would they run you over? If they're patient enough to be stuck behind you going up the hill, I'm sure they'll be glad you're descending the hill at a quicker pace, no?