Vieraana
Still a guest, which is a perfectly nice thing to be and comes with a chair and no rake. Nothing you missed was obscure - every word here is ordinary.
Three letters would have carried four of these questions. Mökille is toward it, mökillä is at it, mökiltä is away from it - Finnish puts an ending where English reaches for a preposition.
From Could You Handle a Mökki Weekend? - 6 lines of real spoken Finnish on Finnish IRL.