I am not so familiar with 80m. At home I have no antenna for this band, from summits I have activated 80m just once.
Is there a center of activity for SOTA CW on 80m, anything like 7.032 or 10.118? Weeding through the spot frequencies of previous activations did not give a complete picture. 3.557 and 3.558 each appeared once in the last 72 hours.
There is very little SOTA CW activity on 80m but the main users of this band, John GX0OOO/p, Tom M1EYP/p, Klaus DF2GN/p and Fritz DL4FDM/p, keep to the original idea of looking for SOTA activity a couple of KHz away from the recognised QRP calling frequencies.
Around 3556-3558 KHz is the most popular (3558 is often in use by members of FISTS)