I have a conference up in Arrowhead in the next few weeks. I'm considering taking my S60, as the conference center has a EV charging station. Assuming I have 150 rated miles at the foot of the mountains (Redlands area), how much juice should I expect to use on the way up (about 25-28 miles up Highway 18)? Do any of you forsee any difficulties? (Note: I did see a thread on this awhile back, but I believe the person making the drive did so in an 85, and headed towards Big Bear as opposed to Arrowhead).