McQueen's Island Historic Trail & more

In a pamphlet I recently received from the Rails-to-Trails Conservancy, they had brief descriptions of the following trails:

• McQueen's Island Historic Trail in Georgia
• Big River Regional Trail in Minnesota
• The Historic Union Pacific Rail Trail in Utah
• The Capital Crescent Trail in the Washington D.C. metro area
• Cole Harbour Salt Marsh Trail in Nova Scotia, Canada
• Lake Mineral Wells State Trailway in Texas
• The North County Trailway in New York
• Summerset Trail in Iowa
• East Bay Bicycle Path in Rhode Island
• The Bermuda Railway Trail
• The Swamp Fox National Recreation Trail in South Carolina

Here's what I'd like to know:

Have any of you ridden any of these trails?

Is McQueen's Island actually an island?

Is Lake Mineral Wells Trailway the best rail trail in Texas?

McQueen's Island Historic Trail & more