I find that some people are just very sensitive to giving only money or gift certificates, especially depending on how it's mentioned. Others like to buy things they like and not things from the registry and then you have those who just want the gift opened for all to see at the shower. However, there are many creative ways of suggesting it. One idea might be to have the person(s) throwing the shower to suggest it in the invitation or via word of mouth that in order to make it easier on mom-to-be all gifts from the gift registry should be sent to her current address. They could also suggest ideas for gifts that would be easy for you to carry back such as gift cards, cash, etc., or even making it funny by saying, money orders, western union, etc. They could even suggest fun ways of still giving the gift such as cutting the picture of what someone sent to your home address and slide it in the card, so it's more personal, i.e., in order to make it easy on the mom-to-be, please have all gifts sent to her current address and to make it fun for all, please save your card for the shower and cut out a picture of the item you sent). There are many ways to be creative with it. Good luck!!