A must-bring for me is the little Tide laundry stain wipes. Last time we went to DL, I dropped a big old glop of water proof foundation on my black birthday shirt that I was insistent on wearing to the parks that day. The wipe removed it completely and salvaged my outfit!
I took the laundry/ hamper idea and I thought why hadn't I thought of this before. I got one of the mess bags. We resort/hotel hopped 4times (1st at 1 hotel for Rundisney, beach, Pop then for work CSR). It was nice because I kept all the dirty clothes away from my clean. Then put the whole bag into one suitcase and everything else into my other.