Hi Sarah,
VIP tours are a great way to get around the parks quickly and efficiently. The VIP guides are the best of the best cast members who can do wonders to make your vacation experience great. They cannot, however, take you backstage in the parks. The entire VIP tour will take place onstage in the parks during regular guest hours.
If you're interested in going backstage, there are a number of other tour experiences in which you can do this. The longest and most detailed of these tours is
Backstage Magic, which lasts about seven hours and goes behind the scenes at all four parks. There are shorter tours that focus on just one park or one thematic element. I've been on several of these experiences including: Backstage Magic, Behind the Seeds, Keys to the Kingdom, Magic Behind Our Steam Trains, Dolphins in Depth, Backstage Safari, and Wild Africa Trek.
I'm happy to provide you with more information about any of them. Just let us know what you need.