Replying to Oregon Coast

Hey I'm from Calgary Canada and me and a few friends are planning on road tripping along the coast this month. I've been to Oregon before with my family, Cannon Beach etc. We stayed in hostels. But I'm wondering what I could do in order to avoid expensive sleeping. Tenting on the beach is what I would most like to do.

Also if you know any nice places to visit while I'm there. We want to try and avoid other people as much as we can.

Let me know, thanks.