Will restoration druids with prebis bear gear be able to do the sethekk halls stealth kill last boss farm or will you need to be feral spec / feral raid gear too?

My resto druid will be PvE resto spec and a pvp resto spec, so will I need to respecc to feral anytime I want to do the sethekk halls solo or can I just throw on some bear gear and do it as a resto druid?