Ok, I need to know three things. 1. Where can I find thunder..

3. You have to get the necklace 1st. It's found on the beach in oakvale between 2 overturned boats. You have to "use" your spade to dig it up. Take it back to her.
2. Nope. This is the only way.
1. After lady gray says that you will have to prove yourself in battle, go through the gate behind bowerstone north. Thunder will stop and talk to you. Follow the path all the way to hangman's hill. The 1st half of the battle starts there and the 2nd half is in a cave.
Hope this helps you out.

1)Thunder is at Headsman's Hill after Lady Grey tells you to face him.Go to the Prison in Bowerstone North and then keep going north in the next few areas.(B.t.w. You don't have to kill Thunder to marry her just defeat him.Though,you can kill him...)
2)No.
3)In Oakvale,on the beach between the two overturned boats.You'll need to buy a shovel and go down there and dig it up.

1. Thunder can be found at headsmans hill. If you don't know where that is then you just need to go out of bowerstone north and he should speak to you. And just go to where he says.
2. No you have to do what she says.
3. The neckalace is between to upturned boats in oakvale

Hope I helped

1. You can find Thunder outside the Bowerstone jail. You need to follow him through the map to eventually end up in Headsmans Hill ( you might have been there before to kill/save the bandit that was being executed there earlier on in the game). Oh, and don't forget to get the key that is at the bottom of the hill in the pond (you'll see what I mean when you get there).

2. No. You have to do the missions set up for you, and there is no way around them. Try to suck it up for now. The payoff is definately worth it!

3.To get the necklace, you must go to the Memorial Garden in Oakvale. When you get there, listen in on the bandits conversation and they will lead you to the necklace. Oh, and you need to be quiet! To do that, click on the left thumbstick as you walk. You can also kill them for some good points. For evil players, just murder some townspeople on the way there. I believe one of the bandits has an apple on him (or something equally as useless!).

Good Luck!

1. Headsman Hill after you get her the necklace.
2. No
3. Buried between two overturned boats on the beach in Oakvale.