I had a Brazillian ..... once ..... and it was prior to a week in Cornwall where it bloody well rained all the time (in August) and I never even took my cossie out of the bag !
Truthfully, unless you're going to be wearing a micro-thong, a "bikini" wax is all you need for the beach. Most people who go further than that do so for "other", nearer to home reasons ! .... though the beauty therapist who did mine did keep prattling on that it was more "hygienic" all off .... would have thought that that wouldn't be an issue unless you were a grubby article who never washed.
Be warned, a Brazillian does hurt - a lot - and is also very embarrassing ...... though if a salon is offering it, they will have seen it all before (at least that's what I kept telling myself). I was asked to "trim" myself, and wear a thong on the day. You're asked to - ahem - "arrange" the thong by pulling it "up" and to one side, so that one half of you can be done, then the opposite way for the other half below, then you roll it down so they can do the "top" hair. I was on my back for this with knees akimbo. However, I have heard of places where you're asked to get on all fours and wear no knickers - however skimpy - of any description at all !!!
Like all waxing, it never gets the newish hairs which are too short so I spent ages after plucking - and that hurt quite badly too.