Just bought an iPod classic 160gb as the 7 year old Toshiba Gigabeat's battery died (we can still crank up the tunes at home while working outside). Not wireless but can run on 12 volt or USB and plug into the speaker port in the camper or truck. Just need to add a stand alone speaker for outdoors when we boondock.
This is an apropos question as I am editing my music files, over 200gbs. Psychedelic, British blues-rock, country rock, southern rock, grunge, hair/arena, progressive, jam bands, classical, classic and contemporary blues, metal, 2000's bands and more. I love my music.
I am trying to think of on the road songs but we just use shuffle and drive on. "Against The Wind" Bob Seger comes to mind. "Up Around The Bend" CCR, "Wishing You Were Here" Chicago.