A lot of people have gone ham but you can get a handheld for that. Beofung makes a reliable and inexpensive one. Just study and get the basic license and you will be good for whatever is being used on the trails.
I wouldn't advise anyone to wire into the stock wiring personally. You are asking for trouble down the line. You can either run wires straight off the battery fused for now (remember to shut it off) or you can go with a auxiliary fuse/relay panel (best solution but more $ required). I ended up wiring a fuse box in from bussman and it is wonderful. Easy troubleshooting for both accessories and stock electrical systems plus all your accessories are not clogging up the engine bay with tiny wires. One wire to the fuse box and then you can loom the rest of the wires to the cab.
Cbi has a permanent mount cb antenna and I can't remember who makes the drifter mount but the drifter mount goes on the rear hatch area.
I like the build! The wood paneling came off very nicely! I still need something to lift the front but like you cashola is not always as easy to find lol.
Edit: FYI on the cb radio. Hook it all up and mount wherever you like (the ashtray seems to be popular for small radios like yours) but remember to get the antenna tuned before using it. You need to find an swr meter or you can go to a local radio shop and the going charge is 20 bucks for a tune and they know what they are doing.