I assume you're looking at the 17" MacBook Pro. They're still pretty new and demand is high, so it doesn't surprise me that they wouldn't have a display model right now. I would wait a couple of weeks and schedule another appointment if you'd like to see it in person.
I am surprised that you found the staff to be inept as that's exactly the opposite of my experience with the staff at my local store. Fortunately, there are forums like this one that can help answer your questions and set expectations.
The Boot Camp software is very straightforward. There is no special magic to it, basically all Intel Macs use commodity PC components under the hood. So, Boot Camp simply facilitates the installation of Windows by splitting your hard drive into two partitions - one for Windows and one for the existing installation of OS X. Once installed, it works just like it would on any PC, except that you can choose which operating system you'd like to boot in. This is done by holding the Option key immediately after turning the computer on.
Alternatively, you can install Windows in a virtual machine, using a product like VMWare Fusion, Parallels Desktop or the free, open source VirtualBox. This allows you to use both operating systems simultaneously, with the ability to move files and share programs between operating systems. It also allows for a greater degree of flexibility in installation, since it doesn't make any major changes to the structure of your hard disk. Lot's more information is available
here.
Obviously this doesn't make up for a live demonstration, but it should give you and idea of how it works.