{Count down to Mbox Retreat}

I am on the final countdown of our quarterly scrapbook retreat with the Mbox. I am so excited I have all of my pics in baggies ready to scrap. Now all I have to do is pack. Crap that is the hardest part. I mean I wish I could take it all but how? How do I decide? I just know what I take I won’t use and what I don’t take I will need. Any thoughts or suggestions on a good way to pack for a 4 day retreat?