Go on a trip the couple did, indeed. It was just that they were definitely going with an entire party. They were not going to the borders, which was already dangerous, but straight to Level 2 where his expansions were.
This time, they wanted to overprepare. The last trip was too dangerous, and had it not been for the barrier 'suddenly appearing,' they really would've died.
They were extremely thankful to Finn, who had saved their lives countless times, directly and indirectly.
By this time, Leiah and the others knew the truth already, just that they didn't point it out. If he didn't want people to know he was the actual owner of the Inn, they would respect that. They would even reinforce this if needed.
