I have seen that a lot of you are going or have had a postcard guest book. I love the Idea!! My only question is where did you buy the post cards? I am getting married in Harbor in Long Beach then taking a 3 night cruise to ensenada mexico. Do I use Long Beach postcards or Ensenada ones? And if I use the ensenada ones where do I get them from? I have tryed to google it and looked on eBay and did not find much that wasn't not over $5 a piece. any ideas?