I tried both my feral druid in all purples badge gear and my mostly blues and s2 xbow hunter.
the hunter is way way way better than the druid.
druid in cat form is super high dps with good gear but has no survivability, in bear form the dps is just way lower than a hunters.

go beastmaster spec, and get the owl as a pet (screech is aoe and holds packs of mobs, this is how they don't go for ur alts)
now spec all the important bm talents like extra dodge on your pet etc. focus more on the pet than your dps. get the leggings of beast mastery (directly adds like 500 hp and a bunch of stats to your pet not u)
then have ur alts on follow (or strategic spots depending on their level and instance) and just go thru instance like normal, send in pet then dps single target down.

it may sound slow, but it is REALLY fast. each mob drops in a few quick seconds, you will get good and start sending pet to next group and streamlining. learn to do the non clipping steady shot/auto shot rotation macro
it is quite worry free and fast instance boosting.

AND you can boost exact same fast way through scholo (scholo > strat for hunters u just tear thru clothie mobs) and hellfire ramparts (ramparts ur alts will die on last fight until they are higher in hp so self res on some alts helps)

i don't loot with the hunter since mobs are far away when they die sometimes and hunters are always really low on space. looting while boosting with hunter will really slow you down.