Hey Ladies

My Husband is stressing over who to tip this Saturday for our after the wedding celebration in our backyard. We contracted a caterer through them we got bartenders (35 an hour charge for each bartender) and the caterer has waitstaff. We asked the caterer if the hefty over 2000 service charge went toward tipping the staff and they said NO. Should we tip... and if so how much? What did you do for tipping at your wedding or what do you plan to do? Thanks! Molly