If your too tall you can go over loveland pass, which basically goes around the tunnels. That is where the haz mat semi truck go. If you haven't already gone to coloradodot/traveleisenhower-tunnel you can see pictures of large semi trucks going through the tunnel. I have driven through the tunnel many times, just not in my MH yet. There are also some cams on the CDOT web site.
2011: 54 days, 2012: 218 days, 2013: 175 days, 2014: 196 days
2015: 188 days, 2016: 72 days,
2009 Berkshire, 390QS, and toad