I don't know if this will be of any help, but for our honeymoon we went on a 2 week cruise. So, for our wedding we registered through honeyfund.com and instead of people buying us toasters or blenders they could go on our honeymoon registry and buy us portions of our cruise. It was totally free and it made it easier for people b/c they can use their credit cards through paypal. If you don't want to use a website I've heard of being able to set up a gift registry through travel agencies. I don't know if they charge any fees, but it would be worth looking into. When you send out the invitations just make sure to include where they are registered. If you have any more questions, feel free to PM me! Oh, and I think it's wonderful what you're doing for your parents!
