I too am v definitely a weekend only camper, and a recent convert at that. DH and I seriously contemplated doing 2 weeks camping on a Eurocamps site in France this summer but fortunately he has had a good year work-wise and we have splashed out on an air-conditioned caravan with deck, as per
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However, for our one or two weekends camping per year in the UK we bought a Gelert tent in the sales for less than £200. Here is the thread I started when I bought it, has a link in first post www.mumsnet.com/Talk/camping/895604-Aitch-Aitch-I-39-ve-done-it-I-39-ve
Table and chairs: don't get the ones with the fixed seats, say all my much wiser camping buddies.
We have some small foldable fishing stools from decathlon for the dc and directors chairs for me and dh.
We also have a torch and a little lamp to use inside the tent at night.
We only go in the summer so take our usual duvets, sheets and pillows, rather than sleeping bags.
We do have a quite nice blow up beds, but borrow our friend's electronic pump to do the blowing up bit.
We have picnic-ware, enamel mugs and a mishmash of old cutlery always packed in the picnic hamper, so we just take that with us.
But we are very namby pamby lightweight campers who ONLY ever go with a group of friends, so all equipment gets shared.