LLC or S Corp for sewing business?

I design and sew childrens clothing. Several boutiques in my area want to start a larger business relationship with me. I have spoken with an accountant who suggested a S corp, but I think an LLC would be simplier. I must admit I am very creative but the business end stumps me. I would like an organization form that would allow me to build credit seperate from my own, but would be simple to maintain. any advice would be very helpful thank you so much