When we had a bout of nasty diaper, we did four things - special cream (not prescription because we couldn't get one prescribed, used Triple Paste and the red Boudreaux's), no wipes (baby wash cloths instead), all natural disposable diapers and Triple Wash in his bath.
After every dirty diaper I would run warm water in the tub and rinse him off. Then I would fill the tub with clean warm water and add the Triple Wash. I allowed him to sit in the tub to soothe his bottom. When I pulled him out of the tub, I patted his bottom dry and/or I let him air dry with him laying across my legs on his tummy. When the rash started getting better, I used the baby washcloths instead of the wipes. I would dampen them in warm water and then wring them out. I would gently pat instead of rubbing his bottom clean. Sometimes if needed I would put the Triple Wash on the damp washcloths for more cleaning power.
We did hours of diaper free time outside (backyard, old sheets over the grass), in the bathrooms or in the kitchen. He was walking but he was never bothered when he crawling around on the tile. We did not do diaper free time at night because he was getting too cold. We did buy puppy pee pads for his crib so the mess would be minimized overnight. I would recommend those if you put him in his crib with no diaper so it will be easier to clean if he goes. Good luck.