Wedding vendors work with so many other wedding vendors. Every week they work with a different planner, caterer, location, florist, etc...
It's worth asking a wedding vendor you've hired who they recommend for a wedding "position" you're still trying to fill.
So for example, when you meet with your florist, ask them if they can recommend a good photographer or baker or stationer.
Vendors will know who may be a good fit for you based on what you've told them about your wedding and based on the fact that you've hired them and they will know who will best compliment their work.