I really think you're putting the cart before the horse here. You need to get on the ground and get a lay of the land before you go seeking mentors. As others have said, there may be a formal mentoring program, your colleagues on sabbatical may volunteer their time, or they may begrudge it.
Also, never underestimate the power of a little ignorance. I found that not knowing what was going on was sometimes useful my first year. When faculty got into squabbles and wanted me to take sides, I could just cite my 'newness' and back off. I can't do that anymore, unfortunately.