The location of your sessions is irrelevant Tuffer, your track intervals could be carried out anywhere, and your XC is a sustained 40 min run that could be on the road a trail even the beach, it is the content that is important.

Many years ago when I was into orienteering, a guest speaker who was a world class swedish guy stated that he did his intervals on the roughest terrain he had near him as this was the surface he competed on.