The Arctic Isulation package is probably over-hyped, it adds some reflective bubble foil insulation at the bottom of the belly and some additional roof insulation. It is useful, but, not in "arctic" conditions. It does NOT include double pane windows (or as John said above "double pain", not sure it the pun was intended, but I know some people who feel that way about them).
You should be able to see the buuble foil along the seam between the frame and the belly cover. ...and speaking of that seam, to my mind, the gaps along there largely defeat any good done by the bubble foil. If you are going out in cold, (and especially windy) weather, it would be worth putting some effort into closing up any gaps in the belly cover.
OntMont (John and Donna)
2005 Montana 3670RL
2007 Silverado "Classic" 3500 DRW 4x4 CC D/A.
2001 Border Collie to ride herd on us.