We've done lots and lots of traveling with Mabel. Lucky for us she isn't a whiner barker to begin with so strange sounds and such do not bother her. What bothers her is being in her crate and in the same room with us when it's bedtime.
At home she's downstairs in her crate at night and we are upstairs in our bed. But in a hotel she can see us and wants to be with us. She will start doing this pitiful little whine that turns into this grunting noise that sounds just like a baby 'gator. LOL
Of course we would give in and put her in the bed with us.... then all she wated to do was play. LOL
Soooo, what we do now is have a full hour plus of playtime in the hotel room. We play ball, tug, cover monster and Easter eggs (hiding treats all over the room for her to find). Then she has dinner and a walk to do potty business. Then hubby and I do our nightly getting ready for bed routine while the other plays a low key game of ball with her. Once we are both ready for bed I'll get a very warm wash rag and wash her face and ears. ( I have to wash her face everyday at home and I'd noticed it relaxed her and she's usually take a nap after. LOL )
Then we put her in the bed with us and she's out like a light and sleeps till morning. Sometimes she'll stay in bed under the covers and we'll have to wake her up. LOL
So in a nut shell, we wear her out, fill up her belly, drain residual energy,wash her face and treat her to sleeping with us.