Camping
I am planning on a tour in July in a campervan. Are ther any nice camping grounds that are inexpensive? or national parks anywhere along the Almalfi coast. I would prefer small and inexpensive campsites :D

I'm afraid campervans are not allowed on the Amalfi coast drive, since the road is narrow and there's a lot of traffic in the summer. So if you want to try it, ask for information in Vietri or Sorrento. Otherwise you might get to Amalfi only to be sent back with a fine! I saw it happen before. You could find camping sites in the surroundings (Sorrento, National park of Cilento), or leave the campervan in Salerno or Sorrento and reach Amalfi by ferry, getting a B&B room for a couple of nights, so you would avoid any trouble.