http://www.norway.org/history/after1814/ww2/ww2.htm
It's from your official website, fer chrissake's...
Yep. No choice BUT surrender which they didn't.
Here is the King's words:
"I am deeply affected by the responsibility laid on me if the German demand is rejected. The responsibility for the calamities that will befall people and country is indeed so grave that I dread to take it. It rests with the government to decide, but my position is clear.
For my part I cannot accept the German demands. It would conflict with all that I have considered to be my duty as King of Norway since I came to this country nearly thirty-five years ago"
The government didn't surrender, the country was simply occupied and head figures were replaced.
Quisling was a puppy, the real boss (Terbhoven) was a German.
I have some items to add. Firstly a pure addition which I stumbled across. The Germans did indeed use terror bombing on Norwegian towns. Second, the attack was a complete surprize, the army wasn't even mobilized, and within a day all key points were captured. Third, they fought longer than I thought. The first allied land victories against the Germans happened in Norway, and had it not been for the German invasion into France and the lowlands, the Germans would IMHO have lost in Norway. But when the Allies pulled out it was over.
In Norway there was still fighting going on some weeks after all was going down the sink in France.