How necessary is a screen for long distances?

I'm planning a 2,000+ mile road trip through Western Europe via the Italian Alps/Dolomites in mid September. I'm considering what modifications, if any, I ought to make to my bone-stock 2025 Trident 660.

ChatGPT has recommended a screen and heated grips - heated grips I will almost certainly do, but the screen I am hesitant to do as I think the big ones kinda ruin the sporty roadster look. But will a small flyscreen do anything to wind/chill, or should I consider one of the cafe racer-style fairings?

Separately, I'm also keen not to add full luggage racks - I'm hoping to get away with a large tailpack and smaller rucksack.

Would appreciate any advice from anyone with experience!