Good on ya, Ellie!
I've never had any questions or problems with using the fitting rooms in any store at any time. Since I began to be me in 2002 I always try before I buy any clothing, always in the women's dressing rooms. K-Mart, WalMart, Sears, Penney's, Macy's, all stores treat me with the respect due a customer. I have purchased brassieres from Sears and I had myself measured before I tried anything on.
Point: all customers are to be treated with respect. The occasional bad day is OK, I understand that, but I don't take any guff when the money is in my pocketbook.
Keep on enjoying, Ell.
Wing Walker