Make sure you have a comfortable - and relatively stout - camp chair. You spend a lot of time in it when you camp so you have to get it right.
My main tent is a Black Wolf Turbo 300 Plus - bought before I parted ways with Mrs Squalo (also still got the walk-up glamping Jimboomba Maddison camper trailer I bought for her comfort too! but that's about to be sold) and this is it when my son and I were out for a 4wd park weekend. Tent and sleeping kit, chairs, fire and cooking kit, and maybe a tarp or gazebo if inclement weather is likely. You don't need much more than that.