I mean gee, for golly's sake, like wouldn't you track down every single person at that party the day you knew Maura was missing and ask them if Maura said anything to them that night? Surely that would just make perfect sense. I dunno, sometimes when people have a little booze in them they let some things slip.
Oh right, silly me. Not only can neither Kate nor Sara recall a single person who was there, but they also did not recall who was there a mere two days later. For all we know, Maura said something to someone at the party that could have been relevant. But never mind. I have been told repeatedly that none of this matters at all (because apparently there are a lot of physics out there), and that of course there was a party, and of course it does not matter and of course both Kate and Sara went to a party where they knew no one and were not introduced to anyone or never saw anyone from that party later just walking around the dorms and of course no one from that party ever got together and wracked their brains to see if Maura said or did anything that might be a clue into her disappearance.
Of course it all makes sense that is happened that way.
sara has never said she didn't know who was in her dorm room that night.
I am beyond confident that police know every name of every person that was in that dorm room that night and have been in contact with them.
Why we haven't heard about it, is probably because there wasn't much to tell.
I don't know what exactly you are implying with this get-together. Do you think something happened to Maura in that dorm room?
Kate has said that Maura wasn't making much sense. That doesn't sound like someone "covering" for a friend, that sounds like someone who is also puzzled (like everyone else) by Maura's behavior.
Why Maura decided to return to her father's hotel is the million dollar question of that night, but by all accounts including the police officer, no one was forcing Maura to go to her dad's hotel, this was her decision and her's alone.
You are frustrated because I am not more skeptical about this dorm get-together. But let me tell you frustration ...
Maura has spent time (just three-plus months prior) in all three locations that she is said to have map directions/computer map directions for when she went missing.
She has planned her wedding for the white mountains, she has a book about misadventure and tragedy happening in the white mountains and yet very few people seem to have a clue that maybe, just maybe, Maura was headed for the mountains that day she went missing.
We can jump on all these other theories, she was running away to Canada, she was heading off to some random party, (even though she had directions for three very far apart hiking trails with her which I don't know maybe shows she hadn't made up her mind where she was going until the last moment).
So there is my frustration. this stuff is easily researched.