Actually returns are really easy to make at Target if you have a registry. We got an insider tip from a Target employee when we made many returns from our wedding last June.
What you have to do is get your registry gun, and scan the items you want to return and put them on your registry.
After the items you want to return are on your registry, you take them to Customer Service with a new printout of your registry (With the items on it that you want to return) The registry printout acts as a receipt.
They will return the items then with no problem and you get your money back.
It seems complicated but it really is easy and works well.
We did this with many duplicate items we got for our wedding. I'm SO glad we got a nice Customer Service lady that day.
Whew! Anyway! We will register at BRU and Target.. I've noticed some people buy exclusively off of registries, but some just buy what they want or think you would like..