I read an article in Cruising World earlier this year (or maybe last year) about forereaching. It's done under main alone. I tried it on our 32' Pearson recently in 25 mph winds and it worked fine.
I pointed the boat into the wind with main only then steered off slightly when the boat came to a near stop. I expermented with the helm until the boat would fall off slightly and pick up speed. As soon as the rudder got a bite on the water, she would steer up into the wind again and repeat the cycle. I locked the wheel and let the boat run itself for about half an hour.
You make a liitel headway and lots of leeway.