These guys are often off-frequency and seem to mostly use very drifty transmitters that tend to all also FM to some degree or another. Lots of activity on/around the 3 MHz region, aka the 100 meter band or "TRIOKA".
Spacing is (roughly) 10-25 kHz between frequencies. 3150 kHz seemed to be the most popular "watering hole" Logs:
3005 kHz - 3005.1 kHz, 3006.2 kHz, 3003.3 kHz, 3004.5 kHz
3025 kHz - 3023 kHz, 3026.1 kHz, 3023.4 kHz,
3040 kHz - 3040.5 kHz, 3039.5 kHz (very variable), 3040.9 kHz, 3039.3 kHz
3075 kHz - Also very busy 3076.6 kHz 3074.8 (variable) kHz 3076.4 kHz
3080 kHz - 3079.9 kHz, maybe actually replying to the guys on 3075 kHz?
3085 kHz - 3086.5 kHz 3084.5 kHz 3085.4 kHz, others
3090 kHz - 3089.9 kHz, 3091.4 kHz, all over the place
3100 kHz - Very busy 3099.9 kHz 3101.5 kHz 3098.8 kHz
3120 kHz - 3120.1 kHz 3121.1 kHz 3119.6 kHz, 3121.5 kHz <-- very very strong
3150 kHz - Very busy - 3150.4 kHz 3150.2 kHz, one guy right on 3150.0 kHz, also 3149.8 kHz
3170 kHz - 3170.6 kHz, variable, lots of FMing, carrier movement after keyup - also 3167.5 kHz, 3172.7 kHz