How to survive without a toilet in the van is widely discussed as it is a choice of many people using their vans to live in full time and people using their vans for travel and camping. And there are more than quite a few options for a toilet in the van, both built in and portable, also widely debated and discussed. Showering is a whole other topic addressed in a variety of ways. If you really care just do a google (or the browser of your choice) search. Barefoot Theory has a very nice post about choices as her first van has a bathroom and but she chose no bathroom for her second van.
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