Since you are going in June, you should be fine with your Subzero Parka. Was very satisfied with mine in June 2006 when combined with MH Chugach pants, and FWIW I grew up braving the elements on a farm in SD. My partner had TNF Himalayan parka and Absolute Zero pant, and he never wore the pants as the parka was a bit overkill. Though all this is obviously dependent on whether you run hot or cold, but I would save the $$$ for your airfare or beverages at the West Rib pub.