I'm presently sweating over this myself. I've just booked my sabbatical, 8 weeks off work and planning on flying out to Ottawa in May.
Since it's Rahal I'm having to shave down. Which, I'm happy to do as likewise I want to give myself every chance of getting the best result when I have an opportunity to take this much time off. Massively concerned though about how I'm gonna look even at 2 months going back to a busy office.