108 is great, and yes, there are motels in Bridgeport. You may want to see of Cal BMW/Triumph is doing their "2 pass" Sunday ride on Oct. 7th. (first Sunday of the month ride). Oct. is normally when they do this ride. Normally leaves Cal BMW (in Mt. View) at 7:00 AM, and gets back around 7:00 PM. Long day, but great ride (~550 miles). Normally goes over the Sierra's on 108, and returns via 120 (through Yosemite park), but there are several other options that might be taken. You could go with the group one way, do some "local" riding around Tahoe, and return whenever. Any of those roads are great. Just beware the weather. You can get snow, or it could be warm.