IMO for a base camp operation, one has much more flexibility. Getting a good bag isn’t nearly as pricey as getting a great bag. For example, find a comfy $150 bag at Cabellas and throw another one on top if needed. My wife has found no fewer than 7 good down and synthetic bags from Kelty, North Face, Eastern Mtn. Sports, and similar at Good Will. All were in great shape. We throw them in the washer and run them in our unheated cabin and when truck camping. She’s also found a couple good old green Army wool blankets.
Backpacking is a very limiting factor in sleeping bag requirements.
