Mobile broadband - lockerbie region

Hi, Looking for abit of advice. I'm going to be staying in Lockerbie in South West Scotland over Xmas, for around a week or so.

The house i'll be staying in does not have a broadband connection. I was thinking about buying USB dongle and going on a pay as you go deal. Is this my best option?

3's website shows that coverage in the area is ok. The other main providers don't seem to be covered.