I’m getting married in Newport RI. How much should I give the director at the Rosecliff Mansion for a tip?

My wedding is before you know it. I’m getting married at the Rosecliff Mansion in Newport RI. I’m trying to understand what is customary for tipping. Phil is the director at the mansion responsible for renting the space and overseaing the event.

Next is the Caterer. That is completely separate. The caterer not only charges for the food, but also a hefty service charge. On top of that they have recommended tips… I just don’t understand why they have the service fee. Doesn’t that include the tips?

Help me understand who I have to give a tip to. I’m paying thousands to rent out the mansion, do I need to pay on top of that for someone to oversea the event?

For the Caterer, if there is already a hefty service charge in the numbers, do I have to give them additional $$?

Please help me understand what is appropriate. I don’t want to short change anyone, but I also don’t want to give away my very hard earned money. THANKS!