Stranglethorn Vale is located in the Southern part of the Eastern Kingdoms and is home to Booty Bay (the Neutral Goblin City). The Rebel Camp in the Northern part serves and the Alliance base in the zone while Grom'Gol serves as the Horde's.
For Horde Players, there is a Zepplin that runs from Grom'Gol to Undercity and one that runs to Orgimmar and back. For the Alliance players, if you don't want to walk from Duskwood, you will have to take the boat that runs from Ratchet to Booty Bay.
There is a weekly event for those who like to fish, it is the Stranglethorn Weekly Extravaganva. The zone also includes a raid instance named Zul'Gurub, a 20 man raid instance for levels 58-60 and above.
stranglethorn vale or dustwallow marsh.
Badlands or Stranglethorn vale
Duskwood is located in the middle of the Eastern Kingdoms, under Elwynn Forest (the Human starting area) and above Stranglethorn Vale.
Tin can be found in most zones level 15-30, such as Darkshore/Ashenvale, Redridge Mountains/Darkshire, the Barrens, Wetlands, Ghostlands and the lower-level parts of Stranglethorn Vale.
They're intended to go to Ashenvale, south of Auberdine. But really you can go anywhere you like. Menethil or Duskwood are also similar level, though you'll have to travel from Auberdine to Stormwind via the boat.
booty bay is a neutral port in southern eastern kingdoms based below stranglethorn vale you have some quests there at level points 25-35 as you proceed to level 80 you can declare war on booty bay and yo can receive an achievement from killing the ports captain.
I believe that's in Ratchet, just in the building behind the bank. Its in all of the steamwheedle cartel (goblin) towns, Ratchet in the Barrens, Gadgetzan (capitol; in Tanaris desert) Booty Bay in Stranglethorn Vale, Everlook in Winterspring, Area 52 and Cosmosproket in Netherstorm, and k3 in Crystalsong.
Best location to go after level 27 depends on faction and gaming style. For Eastern Kingdoms - I suggest Arathi Highlands if you have trouble with player vs. player. If you aren't worried about that then Hillsbrad Foothills and Stranglethorn Vale are very popular. For Kalimdor - I suggest Ashenvale and Thousand Needles.
Grom'gol Base Camp is a Horde fortification set up on the Western shore of Strangelthorn Vale, north of the Arena. This base camp represents the Horde influence in Stranglethorn, which is relatively weak. It is being pressed by the Alliance Rebel camp in the North and the economic power of Booty Bay in the South. Grom'gol also suffers from being close to the Venture Company sites.
Ratchet is a neutral goblin village in the barrens and is controlled by the steamweedle cartel. It has a boat that goes to/from booty bay in Stranglethorn Vale. Like most other neutral goblin areas, it has access to your bank/guild bank. Unlike booty bay and gadgetzan, it does not have access to the neutral Auction House. It has a flight path and alot of quests to earn reputation with the cartel.
Did you mean Yojamba Isle? If so it is on the northwestern part of Stranglethorn Vale. If you open the map, you will see 2 islands, on that Northeastern coast, it is the smaller one.
There is no such thing as World of Warcraft: The Frozen Throne. It is called Warcraft 3: The Frozen Throne. World of Warcraft is much different.