Hi,we,er off to see the Tour De France this year and will be taking in the Mountain stage Alp de Huez, which we think means we will parked at the side of the road somewhere up the climb for about 4 nights and during the planning and discussion the subject of the need to do number twos came up and the capacity of our toilet aboard our hymer and then the difficulty of emptying the number twos out of the small hole in the toilet tank. 
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