Portal campground is a very secluded off the beaten path campground. There are number of designated camping spots on the way to the reservoir lake that include fire rings. The road is a high-clearance road that is fairly rutted out with tight turns and very small sections to pass people. I didn't see a single RV/trailer and most everyone was driving a 4Runner, Tacoma, or Jeep. 

Keep in mind that the campground at Portal is 10,500 feet so if you aren't used to the altitude or familiar with altitude sickness you'll want to do a little research before camping here as it's a long bumpy drive out. 

All this being said, Portal campground is a beautiful place to camp and has pit toilets available for use. We camped here in Early July and it was pretty busy but were able to snag a spot by the Lake. This is definitely worth the trip!