Who is responsible for set up?

Hello all,


I am in the midst of planning my March 2021 wedding. And, the one thing that is really stressing me out is who is responsible for set up.
I typically wouldn’t worry because I figured between my wedding planner, vendors, family and friends it would be a breeze. However, my family has made it clear that they are not lifting a finger to set up anything or clean up anything. So this has me more concerned.
My wedding planner has assured me that he will make sure everything is in place and how it needs to be. And, I’m assuming that vendors will be responsible for whatever item we’ve purchased from them. For example, the florist will arrange the centerpieces how we discussed.
However, I don’t want to assume anything and walk into a disaster on the day of my wedding. So, my question is when vendors bring the items, do they also arrange them/set up however need be? If not, is it solely the wedding planners responsibility to make sure everything is in place?
Please share your experiences and any advice or recommendations you have to make sure that out big day goes smoothly!
TIA!