I never pass up an opportunity to share a full-on, start-from-scratch DIY furniture project, especially one that means you get to spend more time hanging out outside.
This cool folding camp stool project by LiEr was created to celebrate Jessica of How About Orange's new line of Arrow fabric. Which, I actually love, but if the bold, graphic look isn't for you, you could easily switch it out for a solid canvas for that classic camping look.
Once you understand how these are constructed, you could adapt for any size. Pack a cooler, and hit the woods!