I would recommend installing Boot Camp for no other reason than knowing you have an emergency backup to fall onto.
In my experience, and without being super technical myself nor spending a huge amount of time searching, there are a wide range of applications and utilities to get max working with most varieties of standard office intranets, VPNs, etc. That being said, if you are technical at all or don't have time or it's just politically not the right thing for you do, it would certainly be helpful to have an IT department that was willing to give you and your situation a little extra attention. Maybe rather than worry about being the only Mac in your office you can approach them and frame it as an opportunity – they might actually be excited to finally get their hands on a Mac and get some experience incorporating it into their office environment. I know from reading posts on Apple websites that many, many employees are requesting Apple products in what have historically been PC only offices.