Yes, yes, yes. Also ramps need room when unloading and many times will not be advantageous, applicable, nor available. How many different people drive your vehicles and how many can backup a trailer? A catered event is not a good time for OJT. Finding parking space for a vehicle with a trailer limits your options and many times will prove to be more of a hindrance than a blessing.... get a van, it will be a lot easier.
Very few trailers have side doors, most vans do, and they are invaluable.
Delivering or setting up in underground parkades is horrible with trailers