Hello! New player!

Sounds good.

So, question. If I bring a large amount of people to the game, is that a bad thing?
I'm putting together a group of people, and right now, I've got about 13 or so.

Its not a bad thing it all.

Just keep in mind that cabins usually only house around four people each, so if you want ones all right next to eachother you may have to do some searching around camp or arrive early.  While there are a handful of larger lodges, they usually get claimed by specific groups of people.  Also, there is a good chance you may not all be able to sign up for the same NPC shift, as there are assigned numbers for each.

As a suggestion, to keep the Rules Marshals sane when you all show up en masse to make characters and sign in, try to have something written up regarding what you'd like to do for a PC - if everyone has stuff worked out ahead of time, it cuts down major time from searching through the rule books and figuring stuff out at such a busy time - and if you write them up well, you will make an excellent impression on whoever ends up helping you. 

Also keep in mind that when choosing sleeping quarters, a cabin full of new players surrounded by cabins of new players is not a positive survival choice.  It would be better, IMO, to have experienced player's cabins adjacent, so they can hear your death cries and come to help/revive you.

Not that Travance is a dangerous place by night.

Not sleeping also might contribute to your survival.

Oh, and don't wander into the woods alone at night...

Not sleeping, while increasing one's playing time, sucks IMO.  I feel invigorated after 4 hours.  Sleeping lightly, is the key.

Also, somewhat ironically, the Inn is the worst possible place to fall asleep.