Hey Nate!
Personally, I believe it's ok to do this. Some keepers may say it'll throw out your Blueys seasons or some garb, But if it is only a week to 2 weeks - I'm sure it'll be ok. I live about an hour outside of Melbourne City, on the Mornington Peninsula in Australia. We have HEAPS of Blueys here, yet the temps and weather conditions are constantly changing. It'll be a beautiful warm sunny 20oC by say 11am, by 3pm it'll have dropped to like 12oC. This may not seem like a big jump - but with being near the water, plus rain etc.., It's no wonder they say Melbourne has 4 seasons in one day. Now the point to all that was that Blueys adapt well. Your Bluey should be fine as long as you provide clean water. To do this - you could try those water feeder thingies that people with mice or rats use. Someone on this board uses one and posted a pic of their Bluey drinking from it.
Anyway - Enough of my babble - Hope this helps you out somewhat.
Luke.

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'In Nothing We Trust'