I think we're never going to know those intricate details for a few reasons:
1. For this specific example - the book that contains the record of the flood wasn't written by the person in the flood itself - it would've been an event passed on verbally to its author. So could finer details be lost? Yes probably - considering they were human writers.
But if those finer details were there, like how did Noah collect the animals, how did he manage waste etc would it make a difference to people's beliefs?
I doubt it. Why? Because there are prophesies recorded before the event occured with such great detail that there was no denying their application Or the actuality Of the event.
Despite that - people say that it must of been written after the fact then. So with not enough information - people doubt the events authenticity. With more that enough detail, again they doubt it's authenticity.
The bible says its writers were human, writing under God's inspiration (meaning events, conversations were more easily recalled to record and information unknown revealed - like in the case of prophesy). So on that premis, God has revealed either a little information, or a lot to that particular author. So based on that idea, God must reveal only what he wants - and yes the rest of the detail comes down to faith.
Using the Noah example again, if we believe that God helped him and his family over many decades build that ark - then we must believe that he would take care of the rest..to get them safe and sound. What if some continents were still joined by land bridges? What if the creator decided to spread animals out so that as humans we could enjoy different animals? We just don't know and that's where faith plays a part - faith that God took care of it and that we just dont know it all yet.
For me personally, I don't believe that the earth is 7000+ years old. There are passages which may seem like they should be taken literally, but are in fact symbolic.