You're not really going to encounter or have face to face contact with the RCMP. As you know, they are stationed in their vehicles at different perimeters.
There's actually a system in place. It may look, from time to time, like they're scattered about the precinct in a haphazard way, but there is a purpose behind the stationing of the vehicles at different points and they do have a system of coverage of each car being responsible for a certain geographical area here on the Hill.
My sense is that if you were walking up to the building here, unless there was something amiss, the likelihood of your being stopped or being challenged by an RCMP officer would be remote.