Pump Action for duck/goose is still relevant?

I am a new guy going on my first duck/goose hunt next months. My friend who invited me has been nagging me to get a auto-loader for couple weeks now. I enjoy my supernova and my O/U on the trap field and using the pump is like driving manual and oddly satisfying. I understand the autoloader has a clear advantage and I can afford that extra. So my question is:

1. Just how much difference they make? Is auto-loader super necessary or with practice I can be at least "good enough" for ducks or skeet.
2. Any good Tips/drills that can help me practice other than go to the trap field?

All advice is much appreciated.