Here is a list of things needing to be rebuilt on Tandalar Island:
Clothworking Structure (26428,35381)100% Completed. Just North of Valley of Repose landing pad. 1/2 Dozen Sheep just to the West on road. Cotton plants further down the road.
Destroyed logging Camp (26212,34905) 100% Completed. SouthWest of Valley of Repose landing pad. Near Snow covered Oak Trees.
Destroyed Essence Circle (25303,35639) 100% Completed. At the end of the Northwest road from Valley of Repose landing pad. Alot of Glowing wisps around.
Aroah Leap Lighthouse (20991,34018) 100% Completed. May unlock future plots as there is a community here under community survey but no plots yet.
There is a Rebuilt Stoneworking Shack at (25200,34945) Near Granite.
Barley and Black Pepper fields are right in Valley of Repose by the Portals and Pads.
To get to Tandalar Island you go to the top of the Sorcerers tower North of Mahagra and go thru the Portal there to Valley of Repose. You can then do the 5 Attunement quests there. There are two ways to do the Quests. One is Crafting by bringing unprocessed resources and the other way is by killing 5 named mobs on the island. The best way is to bring 250 Obsidian Slabs with you so you can Attune to Valley of Repose right away.
Once you have Attuned to the Island you can then port there to the 5 places for free from any racial city.