Not a clue about the chair
But as to the mat, put it this way, if I could only take a sleeping bag or the mat, the mat would win. I could sleep in my clothes ontop of it and be warm enough.
Depends where I'm going.
Most of the Meets are less than quarter of a mile from the car. If we're walking around we usually just take enough for the day and back to site at night.
I don't do heavyweight packs if I can help it at all. The fact that I would even consider this mat kind of says an awful lot for it.
I said on another thread that my first camps were still of a time when we scraped out hollows for hips and shoulders, and if you were lucky you had a bit of waterproofed cotton to use as a groundsheet. Eventually we got the blow up airbeds that didn't weight as much as a box spring mattress
and then along came the closed cell mats, and we thought they were brilliant
Then the self inflating ones
and then the downmat
It's been a continual process of improvement, and as the budget has allowed I've bought what I knew I would use.
These days those first quarter inch thick closed cell mats wouldn't even get used to pad camp chairs to block the wind, but if it's what you have you make them work for you.
cheers,
Toddy