We have just returned from Borovets.. We did the Skidoo safari and thoroughly enjoyed it, we booked through our rep...and it cost us £24 per person...(adult) and £12 per child. We were out for an hour...it is good fun and a great opportunity to take some pictures if you are sat on the back as they don't go too fast. The ones we used were based past the rila hotel opposite the Alpina restaurant.