I had all 4 wisdoms taken out under GA 10 years ago. For me personally, it was remarkably pain free and easy, even though I'd been scared stiff by stories of wrenching and bruising beforehand.
People kept trying to persuade me to have them out with a local anaesthetic, but I had bad memories of having a molar out under local cos of an abscess when I was small - and I couldn't have all 4 done at the same time under local, either. I also knew from previous ops that I tend to recover from GA well and quickly.
As far as I remember... I kept my pants on under my hospital gown, on the grounds that it wasn't that end they were interested in! A nurse did up the ties on the back of the gown for me, but then once I was on the bed, I didn't have to walk anywhere with my (panted) arse hanging out, I was just wheeled where I needed to be.
Canula in hand they got right first time, which helped - then I was told to count to ten as the anaesthetist gave me something via the canula, got to 5 and that was that.
Then I was awake in a bed very quickly, talking straightaway, and even wondered if they'd decided not to do the op. I could just about find the holes at the back of my mouth with my tongue, but only just - they are so far back - and my jaw felt achey if I opened it all the way, like a full on yawn - but if I didn't do that, it was fine.
I was given Kapake painkillers to take home - they are paracetamol and codeine, and totally sorted the pain. They were very strong, and used to knock me out quite a bit. I used ordinary paracetamol after day 3.
I went walking the same afternoon as the op on the beach, with my dog and mum, and genuinely felt fine. I'd booked 4 days off work, but really could have gone back earlier.
Foodwise - soft or mashed veg is your friend! I ate a lot of pureed swede and potato, fruit compote with yoghurt etc. Icecream was nice, too. It's partly that this all puts less strain on your jaw, which will have been opened a long way and held open for the op - also you don't want any bits of grain or rice or crumbs etc near the gaps at the back of your mouth for a few days.
Long post, sorry, but I got so worried about having my teeth out beforehand (esp as the op was moved FOUR times...). And it was fine. I also had no visible bruising, despite everyone's warnings about being a Hamster-face-chops. Hope your op goes well, I'm sure it will!