My experience with kindling does is the less you do the better. As long as you've gotten the proper nesting material and conditions (I'd say the heat lamp is a good idea since it's so cold). With my does the less I interacted with them during the kindling process and the first couple of weeks after birth the better they do. Just peek in and make sure feed and water are good and then leave. Only other thing I did was check for dead kits about every 3-5 days or so just so you don't have one laying in there for too long.
It all boils down to stress. You don't want to stress mama out or she'll be more likely to have kits die at birth or not care for them properly afterwards. So the least human, and other animal, interactions as possible is what I say. Let nature take it's course.