I used to NOT take a camp chair but the past few years I have been taking a folding, above ground chair.  Otherwise my butt gets pretty sore sitting on logs or rocks by the end of a week long trip.  I recommend hefting all the various models of camp chairs and finding the lightest one which is also rated for your body weight...there is quite a difference in chair weight between models.
Campmor makes a medium sized model, larger and can carry more weight than a child's size chair, but substantially smaller than a full sized folding chair.  I have a friend who has one of these and it has worked well for them.