Hi!
I am brand new to the site and this is actually my first post.

I have a 12 week old named Jayda that I leave in an X-Pen while I am at work. I purchased a clear shower liner from Target ($5.99), cleaned it and placed it on the floor under the pen. It works perfectly. If she makes a "mistake" it is a quick and easy clean up.
I don't know about the other part because I haven't trained her to go outside yet, sorry!