It also has to be rising lava, because lava always rises in the metroid series (not).
The other thing is that they never seem to update. The whole metroid stuff is still based off of super metroid. Although now theres a prime stage (thank goodness). But I think the whole metroid aspect needed a complete overhaul. Which I wont talk about coz it goes offtopic.
Phendrana drifts could be ideal, with the floating platforms and stuff.
Norfair seems to be an ok stage and seems to scream ridley by design of the stage (lots of air play involved), which is a shame hes not a playable character.
I dont think its about camping, it seems to be about arial ability and control of the stage.