Just because you banged the aircraft into the ground you don't have to evacuate. Given a prompt turnout by the fire service, low temperatures and no fuel spilling I'd suggest that you sit tight and wait. My experience of the fire services at airports is that they are very cautious and will spray anything and everything given half a chance. The real problem though is when you do have a fire. Your passengers will gave to fight their way through foam being sprayed at a vast rate and at the same time keep their footing and not get snagged on bits of the plane as they escape. They'll also get their trolley bags, duty free, handbags etc, wet.
My preference is to sit and wait.
PM