You will definitely want at least a CB. If you can find time to install a proper antenna that would be very valuable. Then you could use a cheap handheld until you can install a proper radio. I do know that the rubber ducky antenna on my handheld CB was worthless inside my 4runner. I had to get a window mount antenna just to use it. And it didn't go far. I just looked and I don't have it any more or I would lend it to you.
Scott Yoder KD0DHP
2000 4Runner, 2.5" lift on 33's, locked, geared & armored.