Can we create toilets outside of toilets?

Number one debate today is how do we create a toilet outside of a toilet. So our first thought was those portaloos you get at festivals but are they a bit too small and gross to invite an audience member into? And then we thought about the cabins which have sinks and rows of toilets; http://www.secondhand-toilet-units.co.uk/, even second hand they are too expensive… So we could built our own toilets but how do we transport them to festivals (if we go to festivals), or we could find a small space and transform it into a toilet… I thought about perhaps buying a garden shed and transforming it into a toilet, we could paint it and really go to town. There are of course toilet tents which could be fun. All of these ideas need a toilet bowl involved so next mission is to source the actual toilets!