Hi Luke, and welcome to the MAS!
Well, right now it's pretty brutal so personal protection is even more important than keeping the scope defrosted. In addition to multiple layers, stock up on some of those disposable hand warmers to put in the toes of your boots and in your mittens.
For the scope, if it's on a computerized mount, be sure to have a good battery to drive it, as battery power wanes with lower temps.
Since yours is a Newtonian, you're in a bit of luck that your primary mirror is pretty well protected down at the bottom of the OTA. The secondary may get some dew or frost, but since it's facing down toward the primary instead of up to the sky it should work for some time before frosting up. I've installed a dew heater wire on the back of mine, but that's because mine is a more open truss Dob and also I'm a bit paranoid about it.
Your biggest dew and frost problems will be on the finder and the eyepieces. You can keep it simple and do periodic de-dewing by using a hair dryer, although that isn't very convenient as you are continually stopping to de-dew or defrost the surfaces. If you're near an AC outlet and have a long enough extension cord you can use a regular hair dryer. If you're out in the field and only have battery power, you can get a little 12V dryer normally intended for camping. Scope Stuff used to have them, but they appear to be gone now. Amazon has them.
https://www.amazon.com/Portable-Car-Sty ... 753&sr=8-8
Be aware, those little 12V hair dryers aren't all that great, though.
For something a little more practical, there are resistive dew heaters that can be installed on your scope. They attach around the finder and around the eyepieces using Velcro. Again, Scopestuff has them, as well as the larger retailers like Orion, OPT and Astronomics.
http://www.scopestuff.com/ss_dnot.htm Caution, the commercial dew heaters are fairly high wattage and need dew heater controllers to make the heat adjustable. You only need the eyepiece or finder to be warmed a few degrees to keep the dew and frost off optical surfaces.
If you are handy with electronic components, you can make your own dew heaters using resistor ladders. This site has instructions.
https://www.dewbuster.com/heater-resistors.html
Barring all the electrical stuff, you can also use the chemical hand warmers to keep finders and eyepieces dew free. Just use a rubber band to lash one to the side of the eyepiece or finder. And keep the eyepieces you are not currently using warm in your pocket.
Oh, and if the mount and OTA gets all dewed or frosted up, don't fret. Just bring it inside after your observing session and wipe it down a little and let it dry naturally from there. It'll be fine. In the summer when my stuff gets all wet from dew, I just spread it out on the driveway in the sun the next morning and let it dry. Of course, do your best to dry off optical surfaces right away. Don't trap dew on lenses by putting the dust covers on and leaving them!
Hope that provides a good starting point.