Can you help me with tips

for my Dad's surprise party?

We have the DJ for 5 hours...I'm thinking a $50-$75 tip...same with the videographer...

Does a Matre'd work like at a wedding, meaning do I tip on top of the added gratuity? We are paying gratuity already...should we add on more? How much? We have 77 guests.

TIA

I think $75 is good for both the DJ and Video
If the gratuities are included in the contract then I wouldnt give extra unless they go over and above for you