My take on this
Tim,
Are you asking the question about current Roadless areas defined as RARE II, or to areas that would be covered under Clinton's Roadless Rule, once it becomes law under the 111th Congress and Obama?
The answer would be completely different depending on which Roadless you are referring to.
We can currently snowmobile in many so-called Roadless RARE II areas.
Here are a few links to information regarding Clinton's Roadless Rule, which as you probably know, is still bouncing around in the courts.
http://www.snowmobile-alliance.org/uploads/SAWS_Action_Alert_Roadless_Rule_Deadline_is_Nov_15th.htm
Clinton's original Roadless Rule would have contained three classifications for recreation. Primitive, semi-primitive, and non-primitive. Only the areas designated as non-primitive would have remained open for motorized recreation. This would have literally turned the primitive and semi-primitive areas into de-facto wilderness areas. That is why U.S. District Judge Clarence Brimmer ruled in July 2003 that the 58.5 million acres of roadless areas nationwide was a "thinly veiled attempt to designate 'wilderness areas' in violation of the clear and unambiguous process established by the Wilderness Act."
http://www.sharetrails.org/magazine/article.php?id=1254
5) Provide for primitive, semi-primitive non-motorized, and semi-primitive motorized classes of dispersed recreation. Acknowledges that the motorized user values renewal, isolation, independence, and closeness to nature in mostly undisturbed settings.
http://roadless.fs.fed.us/
Read all you wish. Numerous documents.
http://roadless.fs.fed.us/documents/rule/qa/fr.shtml
What are the values of roadless areas?
Roadless areas of national forests and grasslands represent some of the nation’s most highly valued expanses of open space. They possess social and ecological values and characteristics that are becoming scarce in an increasingly developed landscape. Conserving these areas today ensures that options will remain available for future generations. These areas:
• Provide sources of clean drinking water.
• Function as biological strongholds for populations of threatened and endangered species.
• Provide large, relatively undisturbed landscapes important for biological diversity and the long-term survival of many at risk species.
• Present opportunities for primitive, semi-primitive non-motorized, and semi-primitive motorized dispersed recreation.
• Serve as bulwarks against the spread of non-native invasive plant species.
• Offer reference areas for study and research.
• Consist of natural-appearing landscapes with scenic quality.
• Hold traditional cultural properties and sacred sites.
http://roadless.fs.fed.us/documents/rule/rule_fedreg.html
Primitive, Semi-Primitive Non-Motorized, and Semi-Primitive
Motorized classes of dispersed recreation. Roadless areas often provide
outstanding dispersed recreation opportunities such as hiking, camping,
picnicking, wildlife viewing, hunting, fishing, cross-country skiing,
and canoeing. While they may have many Wilderness-like attributes,
unlike Wilderness the use of mountain bikes, and other mechanized means
of travel is often allowed. These areas can also take pressure off
heavily used wilderness areas by providing solitude and quiet, and
dispersed recreation opportunities.
(5) primitive, semi-primitive non-motorized, and semi-primitive motorized classes of dispersed recreation;