Do I need to get all the stray fairies?

The Great Fairy in Clock Town gave me her mask and asked me to get all the stray fairies in various areas.
I know I missed quite a few in Woodfall and I am not sure I want to go back through that dungeon again just to get them.
Is it going to screw up my game if I don't? What do I get for getting all of them each time?
Best Answer
No. With the exception of the first set of stray fairies that grant you the ability to use magic, the rest of the stray fairies are not required. They're like the gold skultulas in Ocarina of Time. The rewards for catching them all are as follows:
- Woodfall: Double magic meter
- Snowhead: Stronger spin attack
- Great Bay Temple: Double defense
- Stone Tower: Great Fairy Sword
While none of these are required, the double magic meter from the Swamp Great Fairy is extremely useful to have.
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What do you get for collecting all stray fairies?
Location of Fairy Fountain: After you collect all 15 Stray Fairies in the temple, you need to return them to the Fairy Fountain. The fountain is located inside a little hut in Ikana Canyon, near the entrance to Stone Tower. The Great Fairy of Kindness rewards you with the Great Fairy Sword.What do you get for collecting all the fairies in woodfall Temple?
Once players gather all the fairies, they take them to that region's fairy fountain to receive a reward. These rewards aid Link in his journey, so it's good to take the time to fairy hunt. There are fifteen fairies in the Woodfall Temple.Woodfall Temple's Stray Fairy Locations (N64) - The Legend of Zelda: Majora's Mask Walkthrough
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