How about this
http://m.youtube.com/watch?v=bK9GGpy9Nx8
Get it from here it's a lot cheaper and you can use variety of media. I would suggest a large usb stick or a usb hdd caddy with a ssd drive inside. Note I am sure there are many similar options like this out there so you can shop around and look at reviews from users.
http://www.amazon.com/gp/product/B00...=8-4&keywords=
Note u will need a ios or android phone to initiate the copy from sd card to usb etc. so it's not fully standalone, but assume you will have a phone with you. Also if your hotel has wifi than I would also consider backing up to cloud storage if speed is fast enough to permit this.
Edit
Just found this one
http://www.verbatim.com.au/en_AU/pro...eless/features
Which I think you can get at jbhifi and local computer ships for 70-80dollars and it seems to be identical to ravpower mentioned above.
Reviews of a few variants
http://www.colourmylearning.com/2013...le-media-hubs/