I have already been through this area and I am on Disc 3, however I do not have enough HP/AP to defeat the Ruby and Emerald Weapon's, which I am wanting to do before going to face Sephiroth. I found an answer to getting those up quickly on this site:
The best place to level up in ff7 is the Swamp area in the Northern Crater, it is in the final dungeon of disc 3, but is by far the best place to level. If you are leveling to fight the optional weapons (Ruby, Emerald, Ultima)
I have already defeated the Ultima Weapon funnily enough, but the other two just wipe me out before I even get a chance to make a move, I have tried going back to the Northern crater... However when I try to go past the shack where the old man first took us before we make the climb up, he keeps coming out telling us to just forget it and I cant get any further.
Does anyone know how I can get back in there to level up? Or any other methods of quickly leveling up my Characters?