Well, my parents have a beech hedge planted in a position where gets buffeted by bitter northeast winds from time to time.
They lost a few, and whilst the plants were young I think they had some sort of protection around them until established. Looks brilliant now - and yes 3-4feet is fine so long as you're brutal about trimming etc each year. So it's a risk but it can be done.
Maple doesn't sound such a good bet though