if it was in earl august or late july I could probably do it.
some more things to consider:
Limiting items to only homemade will limit some people from joining. I love the 50/50 idea or perhaps limit just the number of store bought items to say a pack of cars or small figures to add to the package.
Your main items in a craft swap should always be crafted in my opinion.
You can make so many things:
Journals- buy a plain one and re-cover it or make one yourself if you are into bookbinding
Pillows- with the characters or pokemon, or pokeballs on them
Totebags- simple to make really. and limitless on the embelishments!
Needlecases or rollups- pretty easy to make
Stuffies- if you use the felt monster tut in the toys dolls and playthings section you can make some adorable pokemon the same way!
Cozys for gameboys, psp, pr mp3 players
T-shirts- Iron transfers are so easy and fun! with only a little work you can have something quite professional.
Record clocks- Do a search on the misc section. They are so cool!
Cd clocks- Same as record clocks.
scarves and hats- it may not be winter but they are still so fun!
Jewlery- shrinky dinks are awesome! So are polymer clay charms, or necklaces!
Pretty much any item can be turned into something one of a kind so limiting to jsut 100% homemade can make it tricky.