you need to be hr4 to get to the volcanoe
Ive looked at the quests i need to do to get to HR4 (cheers MH for the forum) at the only one i might have trouble with is Thunderous Duo but ill do tht wen my mate comes around.
Thunderous dou is pretty easy as long as you stay out of the Kirin's lightning. I bet you'll be able to do it by yourself as long as you use a fire weapon.
Do you recon i could do it with Corona or should i keep on doing Treasure Hunting to get the stuff for Rathalos Firesword+