In the Lord of the Rings world, although the elves were haughty, they would still be amicable to kind humans. Naturally they also wouldn't provide great hospitality to strangers and nameless humans; it was like how people in the present world treated pets. Which goes to say; if they could enter Rivendell upon the back of this innocent maiden elf, Mist Melody, then undoubtedly they could stay for months without meeting dangers.
Of course, Sheyan definitely didn't expect a difficulty 'A' mission to just pit them against some orcs. With the guidance of the little maiden elf, the gorgeous scenery of Rivendell emerged.