I’ve been in vacation mode since October of last year, with a backlog of a few hundred reviews awaiting my eventual return - not quite ready to jump back in yet, but I’ve been using the Kakehashi app (on iOS, but there’s now an android beta as well) to do random testing on the kanji that I’ve ‘learned’ up through level 17, and it’s really helping me to review the 500 plus kanji characters and the vocab that I’ve covered so far via WK, without actually invoking the SRS.
I’d definitely recommend it as a way of getting ready to resume your learning trajectory.