Yes it is regular practice among many of us. I don't see the need to hang them outside for 2 weeks though. Just put them in the dryer and immediately bag them up as soon as they finish. The baking soda embeds in the fibers and will continue to work even while hunting (in my experience.)
I recommended this experiment to anyone last year and I'll do the same again now - put an earth scent dryer sheet in the dryer with your wet "washed in baking soda" hunting clothes. When the dryer cycle is complete, you won't be able to smell the earth scent sheet. Try it.. the baking soda works that good!