Let me first forewarn you that, as a fellow senior, I shouldn't be considered the most accurate source for chances. However, I have had several friends with lower SATs, similar class rank, and weaker extracurricular activities who have gotten into colleges with a similar acceptance rates as The College of William & Mary. I think you are a strong candidate and I do believe, as long as you haven't taken only easy classes, that you should be able to get in, whether you apply early decision or not.
As to your question of whether or not it's restrictive, I have to plead ignorance.
I'd appreciate a chance back when/if you have time. Thanks! Chances at Selective Universities (Thanks!)