Yep. That’s what I’ve done for my Winter set up. I run a larger backpack than I do in the Summer. It’s a 20 something liter large daypack or small overnight pack, coupled with an Allen chestpack up front. I like to cook a hot lunch sometimes and pack a heavier jacket in Winter. (I understand most who fish don’t do stuff like that, but I do. I like being out in the woods and not at work.)
It works well enough, and gives me the extra backpack room I want, but it’s not purpose built off the shelf like the Bean Tech Pack I run in the Summer.
Edit: Also, Osprey suspensions are about the best for the buck out there. I’d say their overnight packs carry 15-25% lighter than most of their competition. It’s enough to easily notice the difference just by feel though. I have one of their 50L packs. I use it for probably 90% of my overnighters. Exception maybe being dead of Winter we’re taking everything type situation…Have an external frame that starts doing better once you’re talking 50 lbs and ridiculous stuff like that.