We have camping recliner chairs, three legged stools, the chairs that fold up umbrella style etc that all stay at home. We use some cheap and extremely light director style chairs with fold up tables that we got at BCF. About $35 each from memory. These ones are excellent for sitting up in. So many chairs are fine until you try to sit up at a table for a while, when you find yourself getting a bad back. Seat bottoms that lean back are only good for reclining in, not for anything that involves leaning forward (like eating). Level seat, no front bar, firm so it doesn't sag. Folding flat can pack in better than umbrella style, to my surprise.
Adjustable height table is an awesome idea with kids. They need to be able to comfortably sit at the table to draw, write etc. Imagine yourself if the table was chest height..... Some friends have the bench seats and they are surprisingly versatile (keep stuff off the ground, seat visitors etc) - but you can't go all day without back support so they each have another chair as well.
And be prepared that you may end up tossing stuff halfway round when you find it isn't working and go for a different style.