She's very good with house training - the only time there are accidents is when she and Pongo play a lot inside (the activity gets their systems going). We do walk them often but sometimes it just comes. It's not common (in fact, it's getting rarer and rarer since now if they play for about 30 minutes I'll proactively walk them).
She just turned 7 months (on July 24th). She should be able to hold herself for 7 hours (maybe a little longer - but I wouldn't want to push it). Her going to the bathroom is the second worry - my primary worry is that she is still a puppy in many ways, she'll get into things while we sleep (clothes, chew up the rug, electrical cords, etc.. even if there are toys the things she's not supposed to play with are more fun
).
Also, the crate is in the bedroom (we have 3 set up in there). I have a bone in there for her and leave a rawhide bone for her, too (those last several nights with her). So she's not bored. I covered the crate, left it uncovered, you name it.
I would love to leave her loose but I don't think now is the right time - she's still too young. Maybe when she's 9 months old she'll be a little more mature (but now she's mature compared to other 7 month old puppies that I've had / seen).