Since my smokers are stored away for the winter, I can't do my Venison on the Smoker. I'm looking at doing my Summer Sausages in the oven. I have them in the fridge packed in their casings already. What's the best way to do this? Really low temp for a longer period of time or 350 for 1 hour? The lowest my oven will go is 170. To check the internal temp, do I poke a thermometer through the casing to check?