Okay, I just beat the giant flower-catepillar whatever the hell it was and I left the transport site. The problem is, the door I left through does not open back up and the only other entrance is blocked by vines which can not be destroyed.
The transport is to the magmoor caves north, I beleive. I know I need to be there because I keep reading pirate activity in that area and all other areas that havent been touched need the grapple to advance. I can't get back into that room. If no on here knows I am going to restart the game.
That's about 2 1/2 hours total game time wasted.