Rode with another Vulcan'er on a ride today. Andre on his 900.
http://i30.photobucket.com/albums/c313/Galanity/P1040300.jpg

After that, took off and went exploring. You think the Vulcan is a street bike only? Think again.
http://i30.photobucket.com/albums/c313/Galanity/P1040324.jpg

Full ride details here http://www.southbayriders.com/forums/showthread.php?t=57460

Have fun!

I've had my Vulcan on more than a few trails like your second pic.
It does pretty good off road. Decent ground clearence for a streetbike and plenty of power that's not too aggressive as to just spin the tires in the dirt.

These trails are a little rougher than they look....
http://www.vn750.com/photopost/data/500/Off_Road_Fun_21.jpg

http://www.vn750.com/photopost/data/515/medium/Trail_Ridin_the_V2.jpg