The question of PC camp furniture is interesting. If you are doing a trader with pack mules, there isn't any. If you are doing military, then some folding furniture is correct. If you are doing settler, then there wasn't any furniture except what fit in the wagon, and the wife probably didn't let it get beat up around a camp fire. The one thing that we can be sure was around a camp was wooden boxes and bales of goods.
The 6 board box is authentic to any era that you want to do. Chests are authentic, just don't get too carried away on the iron work.
We know that people who were camped for a few days or weeks made furniture for use in camp. If you wanted to make your own furniture and haul it to camp that would look OK.
With that preface, we roll into the question of what is "correct enough" for rendezvous. My personal opinion is that folding canvas topped stools are OK. Maybe one folding table. The folding stools with backs are great for us older folks with bad backs. I think that tall wooden Kitchen cabinets only existed on the back of Cowboy chuckwagons or in the personal camp of a General of a large Army.
The really neat curved wooden slat chairs are authentic to about 1960. The two-board chairs are about the same era. I don't think I have ever seen any of them in a museum. The folding canvas directors chair is authentic for the wealthy campers by the way.
My camp has 4 folding stools (two with backs), one folding table (my wife insists) and several 6 board chests that hold the food and cooking utensils. We sleep on the ground (thank God for Thermarests). I keep my entire camp, clothing, guns, poles and food pared down to fit in the 6 foot long bed of a Ford F-150. I figure that is about the same cubic feet as the bed of a two-horse wagon.
I have probably started a real donny-brook here.
Many Klatch