Alan, your wife must be some how related to mine as she has exactly the same view of my collection of kit, also describing my Lwt as an unpaying guest, and like yours she says never again to the thought of sleeping in my 9x9!
As for my category it is usually 7 but I did manage to be 2 last summer at the now defunct Military World Show, Beltring. Sadly I broke a shock absorber going over a rock hard rut in the arena but it was worth it. As for W&P there isn't much opporunity to be Category 2 during the show, unless you have a unique vehicle or are part of the battle re-enactment.