Hello Felicity and welcome to the site,
Firstly don't panic, it's an easy situation to resolve.
I'm assuming your husband will be receiving a 2 year work permit, a TWP.
As such you should apply for a Spousal Open Work Permit (SWOP). Make sure you cross-reference it to your husband's TWP number. This permit will allow you to work anywhere in Canada. You should submit Can$150 with your application.
Alternatively you can apply at Point of Entry (POE). Just make sure your husband has all the proof that he already has a job. Again it will cost you Can$150 at that time. Personally this is what I would do.
This is not difficult and many families like yours have to do the same thing.. Go to:- Welcome to Citizenship and Immigration Canada for more information on the subject.
If you have any more question I am happy to TRY and answer them for you.