The idea behind crate training is not allowing behavior problems to develop. They learn to hold it (pee/poo) & learn to be content (not tear up & chew out of boredom, etc) When they no longer cry at night & no longer go potty in the crate it is usually left open & they are trusted to be left out while you are home & can give them your full attention & only put in w/door shut when you leave & at night at about 6 months you can leave them out for short periods to see how they react, giving them a little extra freedom each month there after by age 12months they should be fully trained & will go to their crate when you are not home & at night on there own-no need to lock contain them. I think the bathroom is not a good idea. Usually they will damage the door, trim & who knows what else which will set you back in training. It sounds like you are researching & trying to raise a well trained pup, I commend you for that
