You do not need your Jepps at training in Denver (-200/-900). You can bring them if they make you feel comfortable, but you'll be given (yet another) red binder which contains all the WOB and charts you'll be using in the SIM. They are 8x11 size too, so its much easier to read inside; albeit they get in the way more.

I'm as guilty as anyone for bringing too much stuff with me on trips/training.

Another suggestion is to call the training department and see if they have any advice for you on what to take.