SRV is awesome! He's one of my favorite guitarists. You should get one of his dvd's and watch him play.
Also Little Wing does have lyrics. It's a Jimi Hendrix song, but SRV doesn't sing it he just plays. The best version for me is when Eric Clapton plays the song and he does sing the lyrics as well. Check out the cd "Layla And Other Assorted Love Songs" by Derek & The Dominos which is fantastic and has Little Wing on it. It was a band that Eric Clapton formed in 1970 and Duane Allman plays on it as well. Too bad they didn't stick together, but the album is one of the best EVER!