K60s are the best(only) long lasting 50/50 tire. You will appreciate them on the dempster of other dirt it is wet and muddy.
One set should last you the trip.
It is a hard rubber tire..ie why it last so many miles but has reasonable bite in muddy roads. Ok on pavement evan at speeds to 100. It is NOT your tourance on wet pavement...so take it a bit easier there.
check out this month BMW owner magazine for a very good article on the K60 vs the TKC, etc