A very relative thing. Some consider items like chairs (and some beers to enjoy while in them) a necessity. For me, very much baggage I'd rather leave behind. In winter I'll carry some closed cell foam sit pads. A few ounces, find a log or rock to sit them on. We enjoyed sitting on a peak the other day having lunch while having some padding to rest on. If you think the hike is going to be hard and weight becomes more a premium, a cut up pad is cheap, straps to the outside of the pack, and has a much smaller weight penalty. You've probably seen the folding chair kits for inflatable pads- no way mine is getting risked like that. Have a fun trip.