You can't go back. Once you made your way further into the game, you cannot go back to the Evermeet Island. The only way is to start a game again if you really really want to do the quest, but there is nothing special. You can continue your journey without any problems because of non completing all the quest on Evermeet Island.
Chat with our AI personalities
Talk to Icy the snowman and he will send you back to Snow Isle GeorgiaRose Palomino server
First you need to have 25% Award, then go to Appleton, go to the flower shop to get 5 bunches of wildflowers(Appleton always has infinite amount of wildflowers) then go back to the Wagon and go to Hoof Isle, talk to Deidra and she'll send you to Sir Sleepwell, He'll then send you to Lava Isle, and to get back just talk to Patsy.
Howrse is pretty similar. There is also Horse Isle 2, Legend of the Esroh
You get to Turtle Isle by taking the boat from Hoof isle docks and that takes you to Shelton on Turtle isle :)
Talk to Patsy on Lava Isle. He will send you to Igneous Isle. Then talk to Cupid. He sends you to Venus on Magma Isle.