Crawlers

How are you keeping your crawlers contained for little things like when you need to go to the bathroom or finish the dishes? My son will not go into a jumper or bouncer anymore and he will climb up any baby gates put up making it dangerous for himself. He can literally crawl across a room in 2 seconds and will climb up anything. We our finishing his Montessori room now so I guess that will be the option to contain him in there when things need to get done but for now I guess I will just hold my bathroom trips Haha