J.W.
B.,
Most hotels have cribs that you can use. If that's not an option, than a pack-n-play might work. Vacations are also a great way to wear your kids out. Make sure she gets plenty of exercise and playtime and putting her down might not be as difficult as you think.
As for not putting her in a big girl bed, don't worry about what other people think. It's up to you to decide when she's old enough to handle a bigger bed.