Every fifteen minutes, you are able to return to the Treasure-hunters' Camp and receive two more treasure-hunter's picks.
NOTE: This quest will be removed from your quest log when the current festival ends.
'Hello again, ${PLAYER}. How goes the hunt?
'If you are looking for another treasure-hunter's pick, go and speak with Halthor Goldeneye. He will be able to supply you with one.'
You should speak with Halthor Goldeneye to receive your treasure-hunter's picks.