Stealth is the key.
Here is just the power center of my 2002 Silverado. That plywood panel hinges for fuse replacement and the addition or subtraction of any new components. Could have had it totally wireless if I didn't run out of steam by the end of the day. I slacked off with the last few wires showing. That's ok though.
It's funny when you look at how nasty the first couple photos are. You would never think it could end being as clean as it is.
This entire set up fits behind the rear bench. My sub fits under the seat. The vehicle is still fully functional and you would never know I'm running about 1500watts.
Be the coolest dude with a K5 and put horn tweeters under the dash before I do this summer!