I agree with C Clearly.
There is nothing to suggest essential oils work repelling bedbugs except a few people who have used the oils and have not been bitten.
Chances are they wouldn't have been bitten anyway.
Not everyone gets bitten.
In fact, most people never see a bedbug.
There are threads upon threads upon threads about this topic if you do a search of the forum.
I always suggest people look at this blog, which shows you exactly what to look for - then if you spot bedbug sign, you simply ask for your money back and move on, not taking a chance.
http://caminosantiago2.blogspot.com/2011/06/dont-let-bedbugs-bite.html
I used to use a mosquito repellant on the beds, but even that is not really necessary if you just look closely for bedbug sign.
If they're there, you'll almost always see their sign, unless they were brought in within the last few days.
The biggest problem I see with using essential oils in an albergue is that other people have to smell them.
Not everyone loves the smell.
And to some people like me, they are poison, causing migraine and 4 days of flu-like aches and pains.
Especially if they happen to be on the bed I get the night after you!