First of all I am not an expert,,,that said...if you want the cheep route, since it is a designated period, I would go the large trash bag method...on the other hand that might keep moisture in...If it is under a roof and will not be exposed to the wet of rain, my next thought is cover it with an old sheet or blanket to keep the dirt, dust off and there you go.
so much for that...not high tec.