How do you manage public toilet trips with a baby and a toddler by yourself?

Like, how?! If the toddler needs the toilet, where do I put the baby? Baby is 8 months and crawling so can't put her on a changing table and most of the time the cubicles are way too small for a pram or even to have her in a carrier. Or if baby's nappy needs changing, how do I bring my toddler in with me without him literally drinking the toilet water? I dont know if I'm being stupid but seriously how do people do it?