It's not a silly question at all!

You could always go with an inexpensive white sheet and accessories from a craft store--TOGA TOGA TOGA!

A gypsy would be fairly easy too and would allow for flowing skirt etc. that would make it easy to move around and sit by a fire. Or buy a white sheet, dye it green, make a torch, buy one of those foam hats and go as Lady Liberty!

You have options. Just remember to take pictures for the TDC!

Have fun!

Donald