Not sure if there is one near you, but we just went to the Lego store around here and the cashier threw in about 25 BOGO coupons. So I really don't think it's something they care about restricting, it's just a matter of figuring out how to do it.
There's some more info on Mousesavers if you google "Mousesavers Legoland Florida"
Thanks for posting this! We haven't been to lego land but would like to see it and since we don't have kids didn't want to spend almost $200 for the 2 of us but with BOGO I am going to order them for our 3 week trip in the spring