Any PA systems installed?
 

I've seen a lot of guys having CBs in their blazer. I'm wanting a PA system with a speaker mounted on outside of the vehicle. I would like to be able to use it as a predator call, so aux input would be ideal. I am completely ignorant in this subject so any advice would help. I've found some PAs but all just have mic with a few siren buttons (no amp fixture).
Here is one i found at a good price, I just don't know if I could make it work for what I'm wanting.
Also, I'm making my blazer a hunting/fishing vehicle, so any ideas or mods you guys have made or suggest for a hunting vehicle would be nice, thanks guys

I have a PA hooked up to my CB. Nothing fancy, just a cheap speaker mounted behind the front bumper. The speaker I got has a 1/8" plug so you can plug it right into a mp3 player. It's not loud without an amp though.

As far as the hunting/fishing vehicle goes. I have the same general idea for mine. My thoughts are just make it into a good off road truck. If you go deer hunting water proofing the cargo area might be nice to haul deer around in. Just my $0.02