I am in Prea now. And the girl with 59kg goes kiting all the time with 5m Best.
The wind is from 20 to 30 knots for 3 weeks.
I use 9m Vegas and overpowered sometimes but still Ok (I am 70kg).
The best place in Prea is Kite-Brazil Hotel. www.kite-brazil.com
I have stayed there 2 times. Everything is perfect. It's not the advertising, that's truth.
There is no nightlife in Prea but you could go to Jeri (5 reais by bus and 30 minutes driving).
Also Villa Prea and Rancho de peixe are very expensive.
In Paracuru I could suggest you Paracuru Kitevillage. www.paracurukitevillage.com
The problem of Paracuru is that Quebremar is far from town and should have a car.