I wouldn't worry too much about your personal items in your room at Borden. You're not supposed to have anything worth taking in your room with you, and if you're hiding your cell phone or laptop in there you're just asking for trouble. I'd follow the advice above and mark everything (issued kit) really well and always lock up anything that can be taken from you. You might be suprised to learn that having things taken from you isn't always the work of thieves. You may find that you're having to go an speak to your course Warrant to ask for things back, which will make you feel pretty stupid. Just ask Jordan (my roomate from Borden BMQ) whos standing here reading this.
Anyway, good luck, just play the game and you'll be fine.