I just got back from my visit to KPK and Kashmir. I was at Sharda last Wednesday. Then there was not much snow on the road and one could've easily reached there. But, while we were leaving for KHI from Balakot the next day, we got the news that it's snow falling in upper areas. If you got a jeep AND a skilled driver (no offence or pun intended) then you can make it to Sharda any way Insha'Allah. We stayed at kutton then and I would recommend the same to you too. Best place to stay in that region as per my very little knowledge and recommendation from Sufian bhai :).
I would recommend to make your stay at Kutton/ Jogran Resort throughout. It'd be a bit stretch to reach there from RWP, but, if you leave early, you can make it I guess. Rest the gurus can tell. Leave kutton the next day, visit Keran and other points till Sharda and back OR you can leave Kutton and stay at Keran. Note that you will loose mobile connectivity after 2 3 hours of travel from Muzaffarabad, not sure about the exact point though.