The outdoor chair is the best looking in my opinion. I have only had the camping cot requested and I thought about building it near my campsite before realizing that's kind of stupid. Who would decide to sleep outside rather than in their tent?
But it all depends on your town theme and your own opinion of course.
The outdoor chair looks like a nice relaxer. the kind of thing you would bring with you when camping that you could set up outside... kind of reminds me of my own family camping trips.
Also the camping cot looks like the kind of thing you would sleep on if you were at an army camp.