It might take you a while to gather the 60 crystallized Lost Ark Gold scales, but it'll be worth it once you're able to exchange them for the token. The rabbits respawn every 30 seconds to 8 minutes, so it would not be to your advantage to camp one spot. For every rabbit you skin, you get between 0 and 10 scales. Do not bother with the caves as no rabbits will spawn in there. If you keep your search skill up, W by default on the gathering bar, you do have a chance of seeing the icon before the rabbit officially spawns.
Don't be hesitant to go to an area that another player is just coming from as it's not guaranteed that they were hunting the rabbits and there could still be some in that area. Once you meet with Aldridge and complete this mission, you can feel free to explore the island or even find the 7 Mokoko Seeds that are hidden around Crescent Isle. These seeds can be hidden or in plain sight, you can even be on the lookout for them while you are hunting the rabbits.
Island Token Rewards
The island token rewards range from 5 tokens to 95 tokens in value, increasing by 5 tokens with each reward. There are 19 total rewards that people strive for and over 90 island tokens total in this MMO. While the tokens, or as some call them souls, are not technically rare, the game does make you work for them and it can become tedious.
Located in the North Vern Sea, Shadow Island is one of the smaller islands in Lost Ark. On the map, it will be shown right next to Shangra Island. Though it is small, there are dangers lurking throughout the land, including P2Pah Lost Ark monsters on every floor of the 50-floor tower.