I registered at both BRU and Target. There is a BRU in the town I live, and most places have a Target. Oddly, things have been purchased off my BRU registry, but nothing from Target so far.
Actually, the person helping me at BRU made their return policy sound pretty great. As long as it's something they sell at BRU, even if it's not on your registry and you don't have a receipt, you can return it there.