Legend of Zelda: Skyward Sword [SPOILERS]

I have a questions for those who are near the end of the game or done with it.

 Spoiler

So when looking for the party thingy for fun fun island, I accidentally accepted the thunder dragon quest. Does that mean I have to do it before doing the other 2? I just looked around in eldin volcano for 2 hours and the entrance to faron woods is blocked. I fear to do the thunder quest first because I heard it sometimes give a gamebreaking glitch.

 Spoiler

After reading up on the glitch (which I'm still not so sure even exists) it sounds like you should be able to to do one dragon at a time, w/o any interruptions then move on to the next and etc and you should be perfectly fine.

So yeah, finish up the Thunder Dragon's part, the game's set up to not let you start the other 2 until whichever one you start first is finished anyways.

Guess I'll suggest what other people are suggesting just in case, make a copy of your save before continuing w/ his part. That way if for some reason something seems off, you can just go back and try again.

 Spoiler

but I still don't believe it exists~