i expect the yellows to destroy all of your plants, i wouldn't bother replanting if i were you.
as for vaccing, if the flow is sufficient you shouldn't need to do much. I have a sunsun tank of similar size as the AR and i very rarely vacced, on when the debris got caught at the base of a rock. if you have a filter intake at each end it generally takes care of itself i found if the spraybar is aimed up a little, creating a gentle barrel roll type flow.