i guess i am a 9 percenter too, i get up 2-4 times a night. I HAVE to drink alot of water, I have ibs-d issues and microscopic colitis issues. I am on mesalaminine 1.2 mg tablets 2 tabs twice a day 12 hours apart as per my gastroenteroligist.
I had kidney disturbances that were pronounced in june of 2019, thankful and lucky everyything reversed to normal but because of that and my own paranoia issues given what id been through/gone through in the past I can easily drink 3/4 of a gallon of a jug of water in day, if its hot like in summer, i could consume 1 1 gallon jug of water in a single day. Water is the best for us folk, whether like myself living with a sub total colectomy (sigmoid colon intact/full rectum w/ a jpouch at the top (stapled) or tose of you who are total colectomy w/ ipaa (jpouch).
I do get butt burn here and there but for me my hemmoroid issues of itching inparticular for which i use desitin are more pronounced that buttburn, especially lately. And wipes are my absolute go-too! Couldn't be without my baby wipes !
Just thought id add my 0.02 cents for what its worth! 
-Len