I don't know what year vehicle you are dealing with...or if full 4 wheel ABS or just rear ABS.
the RABS don't bother me so much as long as I am able to lock the front ones. On dry pavement, even wet regular ABS seem okay to me, but in the snow, dirt, mud one can stop much faster locking them up and only release as needed to control direction.
I had looked into how to disable on my 02 explorer and I saw someone opening up one of the front speed sensor lines. That would cause the diagnostic to fail and the ABS would disable itself. I was thinking of putting a switch in there so I could disable ABS for things like snow. I don't know if that disables the full system or just the front wheels. I would take either for my explorer.
Haven't tried it yet so can't say if it works or not but it seemed a relatively simple means to achieve the result.
The one concern I would have about disabling ABS in the rear is I thought vehicles were relying on that these days rather than any other mechanism to keep rear from locking prematurely. Remembering an old Nissan pickup I had that had some load sensing valve to adjust rear brakes depending on load.