I used flannel flats with mine. We wet pail and use plastic pilchers. They really aren't that much trouble but once I was working 4 days I stopped bothering. We had minimal blow outs once I worked out how to pull it really tight around the legs.
And one of the benefits is you can use them for everything - spew rags, wiping up wee on the change table, blankets and wraps at a pinch.