1. Thank you very much and see you again.
2. Thank you so much and see you later.
3. Thank you for your guidance and see you next time.
4. Thank you for your explanation and take care.
5. Thank you for your kindness and so long.
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After visiting Dokdo, the person returned home. He is writing to Dokdorang, the characters of Dokdo. Dokdorang guided them around Dokdo and explained facilities and things on Dokdo to him. So he wants to express thanks by sending a thank-you letter. At the end of the letter, are the sentences above okay?