Where on Golden Spike is that Hill??? I did Golden Spike 2 years (or was it 3?) ago and it doesn't look familiar. Even driving Stick with Open Differentials I would give that hill a whirl. Would be a rush if nothing else.
Golden Spike is "supposed" to take 8-10 hrs with a small...motivated group. Me and 2 H1's pounded through it in 7...although I would not want to keep that pace again (in my little s10 on 31's). A group of 3-5 movtivated H2's could probably do it in 6-7 hrs. 10+ H2's and you are looking 10-12+ hrs.