A tracer should work regardless of type of wire as long as its copper. Shielding might reduce the pickup but not if you attach to the shield.
I agree that a CB could be useful for the reasons mentioned and just haven't gotten around to hooking mine up. There is still some value.
I had trouble on previous MH getting much reception so wondered about a pro install. Those shops are still those around...one near Knoxville I hear.
Bill & Jenny - 2014 Fleetwood Bounder 35K, 36 ft, Ford V10 - Blue Ox and SMARTCAR. Once/month traveler in Midwest and Southern US. Home - Nashville, Indiana (Beautiful Brown County)