I guess times have changed and installing a stereo into the CT is a bit outdated.
I just thought I would share an a review of a recent purchase we trialled camping over the weekend. Maybe other swaggers can use the same thread to recommend another brand.
We did a fair amount of research on forums and Reviews before choosing this one.

It is a Logitech UE mini boom box. It connects easily via Bluetooth. It easily connected to my HTC, the Mrs Samsung and two of our friends IPhones.
It recharges via USB, has a battery life of 8 hours ( we used it for over 7 hours each night). I thought it was great, can't recommend a better idea for camping trips or sitting around the bar. I thought it was plenty loud and my friends thought it was great.
$94 at JB HIFI, $94 at Harvey Norman, we got it for $79 at the Good guys.