I also have a 2013 PRO-R 800, only 2,000 miles last season.
You've got the WALKER - EVANS shocks on that sled, you should be fine PROVIDED that there's NO nicks/pits on that shafts that causes the seals to fail.
Inspect the shafts, if perfect, I'd say you're good to go
I ran the Walker-Evans on my old 2007 D-7 for several seasons, always sprayed WD-40 on the shafts BEFORE & AFTER a trip, still rode very nice