I did a wax before my holiday last year (I'm pale skinned with dark hair so I didn't want stubble)
I'm assuming you're going to a salon? I've no idea what they're called (brazilian/landing strip) Do they give you paper modesty knickers
I do my own-my advice is:
trim the hair about 1cm (enough to 'grab' ) Exfoliate the skin to remove dead skin and reduce the risk of ingrown hairs. Completely dry skin (otherwise it won't stick) and a dusting of talc. I cut the wax strips into smaller pieces, and use hot wax (those cold strips just don't work for me) Small areas of wax. Pull the skin taut -easier if you're having it done for you. I use an antiseptic Propalis gel after.
This year I won't do it the night before, I did have a bruised area but it settled down.
I find it's on a par with armpit waxing, just more fiddly . Good Luck with the operation BTW.
I have only ever done my own and my tip, to add to those by previous poster, would be to peel the strips back as you pull and not pull them up. Sounds obvious but pulling up causes bruising. Good luck!
If you know roughly how far down they need to shave, then ask the beautician to go just below that (and she may as well neaten up the other edges while you're there ). Easiest is to wear a pair of low-cut/high legged knickers of your own. If you don't have anything suitable, then it will be a matter of adjusting the paper knickers 'to size', as it were.
Made to measure is probably a better idea in your case as a Brazilian might leave the landing strip too high. You could go for a 'Hollywood' (everything off), but they hurt like hell and are highly undignified can be slightly more painful.
Go to a salon, it's just much easier! You can have as much or as little as you want taken off, if you just want hair removed that's visible when you have nickers on then just go for a basic bikini wax, usually about a tenner. I personally don't like being left bald or with a "landing strip" (that's a Brazilian) so I ask for a little triangle sort of thing but I do prefer it when when all underneath gets waxed, I have had my bum waxed too and once you have it done you will ALWAYS have it done!
Some salons give you a paper thong but I would wear one anyway just incase. Be prepared for the beautician to move it around though so she can get to wear she needs to wax (you'll hold it in place)
It's painful but for literally a second and it's the kind of pain you forget as soon as its over!
I've always had 'extended' bikini wax where they take a little more from underneath & top line than basic bikini but not as much as brazillian so leaving neat little triangle but always got a nasty rash afterwards. For the last year I've been having a hot wax instead where they use wax that dries onto skin and grabs hair and pull the wax directly off & it doesn't seem to affect skin as much, plus they do tiny areas at a time and I find it much less painful. It's more expensive (mine is £18 vs £9 for standard strip wax) but definitely worth it. Had it yesterday at 36 weeks pregnant and still very easy to cope with!