Good luck with the tattoo. I think that pain depends on it where you do take it. I have just one smaller on my biceps and it didn't hurt that bad. But the area you describe sounds more painful - tho, I don't know since as I said, I've just one tattoo.
My tip would be that choose your tattoo parlour with good sense. Something well-known and having good reputation. I think that they should hand you also some instructions for aftercare so follow that.
"Ei oo, ei tuu, ei heru, eikä tipu
Tämä elo on kuin kivinen perunamaa
Ei oo, ei tuu, ei heru, eikä tipu
Sieltä ituisia perunoita aina vaan saan"
Stig - Perunamaa