You shouldn't need fuel on the way up. There is a BP and Caltex in Jurien. Access onto the beach in jurien is easy, just make sure you let your tyres down (18-15psi) We tend to go up to Sandy Cape. Some of the beaches there are hard enough you can drive a 2wd comfortably on them. There's not an awful lot to see up there, but take some shade, bathers, and pray for good weather and it can be a relaxing trip and great way to spend a weekend!