All Inclusive Venue Tipping

So we booked a pretty all-inclusive venue. In the contract is says tips aren’t included and clients are encouraged to tip the vendors. I’m happy to tip the necessary people, but I’m just not sure who and how much. I didn’t originally budget for this, so it’ll come out of our contingency funds, so I’m a little worried how much this might cost and am trying to plan. When I asked the lady with the venue, she gave a vague answer saying it is entirely up to us and that about 1 in 10 couples tip, so it is up to us whether we want to and how much. We’re having about 95 people at our wedding and paid about $8000. That amount of money includes:
2 photographers for 8 hours

DJ for 6 hours

Catering with 4 people to serve the buffet and clear the tables

Bartender (but bartender puts out a tip jar)

Day of coordinator (who may or may not be the lady who owns the venue)

We’ve also separately hired:

Videographer for $1100 for 6 hours (but he owns the company)

”Decorator”: someone who will set out all of our DIY decorations for $250

Cake through Nothing Bundt Cakes, we paid $50 for delivery, not sure if we should tip for that? FH is going to set up the cake table.

Please offer advice on who I should tip and how much would be an appropriate amount. I’ve read threads on here and such, but without knowing how much each thing actually costs, i can’t really do a percentage. Thank you so much!