Thnlk said it simply - it takes some time and money to prepare and pack, but fun and interesting too. We participated on our first cruise - over Christmas Day - on the Dream. We brought Postcards from our city as there are some interesting (and well-known) landmarks etc, and an item of candy that was made in the downtown (non-chocolate so no worries on melting). We wrote a personal message on each postcard, as well. So even if the postcards were looked at/read and then discarded, it still provided entertainment at a lower cost, or easy to pack if the family took them home. We received a number of items (some candy, some small and meaningless trinkets), but the kids enjoyed those and some made it home, some did not. Thoughtfulness is important, but does not need to be expensive. One FE gift I take out at Christmastime is a single sheet of paper that has "Twas the night before Christmas" rewritten to be all about Christmas on the Disney Dream and Santa on his sleigh, etc. Very fun to read and always makes us smile. Another gift was a packet of useful items for a cruise (ibuprofen packets was one these items and I was very thankful as I injured my ankle and used these when my small stash was gone). Another gift was a small piece of artwork, personalized for each child, from an professional artist who was on the cruise.
Don't worry about packing everything up in your suitcase - choose a small item and most others will have done the same. Also, I packed an older pair of dress shoes that were fine to wear, but could be left behind if I needed the space (and I did leave them behind - in the trash can so as not to be mistaken as a forgotten item).
For planning purposes I begin writing ideas for FE gifts and keep adding to it until I am ready to get the FEs together. Lots of resources to find ideas - depending on if you are crafty or not. FE hangers do not need to be fancy or expensive. I made the last one (No fancy embroidery, but I did buy nautical trim and gold metallic paint pen for fabric). This time, I am not sure what I will do for the FE hanger, but it will be nice but simple. Also, the FE gifts I am planning to give will be small, as the
DCL cruise departs from Europe.
Good luck with your decision, and enjoy if you decide to participate!