Is there a parking lot area close by where you can then walk to the overlook areas?

There is plenty of parking and easy access to the most popular overlook areas. You can find more info here: https://pacanyon.com/leonard-harrison-state-park.html

Yes

Yes there is,a few different places.there are some nice sites you need to walk or hike to.the roads are very small and nobody wants to share it.if you ride a bike up be careful!