You can usually obtain a large appliance or furniture box, which would be ideal for this purpose, at a furniture store. If you can't get a box just hang a decorated sheet over a doorway. Use a fishing rod or a stick or yardstick with a string tied to it would do. Tie a clothes pin on the end of the string. I use leftover scraps of giftwrap to wrap the little surprises.
Players guess what's in each bag by feeling the outside of the bag.
This game is really fun to make a movie of and watch later. Especially if your projector or VCR allows you to run the movie backwards. Divide players into two equal teams. For each team have a suitcase or box containing a large shirt, shorts, boots and hat. In turn each player must put on old clothes and run to a certain point where they take the old clothes off and put them back in box, then run back to start where the next player repeats the process etc.