Last minute florist suggestions

Tomorrow I have appts with two florists. Anything I have missed to ask:
How many trucks
Delivery set up fee
Number of centerpiece - bouquot- boutinerres- on cake and tables
Who prepares - sets up the flowets
When r they put together
When do I see a sample

What am I forgetting

whats the truck for?
deposit schedule is important, and when can you change flowers until (some say 2-3 weeks before bc they have to order)