Over the years, I've used several different sources to find repeater frequencies. All of the sources seem to have information that may have been credible at one time or another. I think the last one I used was Repeaterbook. I was traveling from Columbus,, GA to Bay City, MI. I entered 2m and .70m freqs only. Using RT Systems software, I entered 198 freqs into my Kenwood TM-V71 radio. The software makes it difficult to make a mistake but, as I usually do, I double-checked the frequencies and PL tones, offsets, etc., after I entered them. I only entered freqs that were said to be near the roads I was driving. For the entire round trip (approx. 1850 miles using mostly I-75), I talked with 3 people. In addition, I was only able to activate 24 repeaters when I "checked in." That's a little over 12%. It was hardly worth the effort.