here is a definition of walking bass....
"a bass part in 4/4 time in which a note is played on each beat of the bar and which typically moves up and down the scale in small steps." ....slip jigs are 9/8, the heavier emphasis or ccent as i understood it is in beats 1 4 7, although here is a different definition here..
Slip jig refers to both a style within Irish music, and the Irish dance to music in slip-jig time. The slip jig is in 9
8 time, traditionally with accents on 5 of the 9 beats — two pairs of crotchet/quaver (quarter note/eighth note) followed by a dotted crotchet note.
Stanron, explained it succinctly, the bass should be on beats 1, 4, 7, where one taps the foot,
when there is a dotted crotchet my taste would be to emphasise a little heavier,
but as long as anything you do suits the band and does not hinder the dancing, fine.