Anyone living with IBS will know the intense fear of being caught without bathroom access… and the dire consequences. Likewise, the quality and availability of toilets wherever you go will be far more important to you than to most.
For various reasons (eg not just related to having irritable bowels!), various people have put together a few “toilet finder” resources – so you can be prepared for when nature calls.
http://www.toiletmap.co.nz/
https://play.google.com/store/apps/details?id=nz.toilet.finder&hl=en
https://itunes.apple.com/nz/app/toilet-finder/id311896604?mt=8