I used a 2020 model 28 on several day trips and one 3 day trip. 3 day trip was early season, no rain in the forecast and was warm. I put a few things (tent, pad, and sleeping bag) on the load shelf to haul them in and out. I used the pack while hunting every day and loved it.
I learned that I really should have a 38 on late season day trips whitetail rifle hunting. Carrying in layers of clothing and keeping them dry was tricky. Bibs and Parka don't easily fit in the bag so I used a dry bag on the load shelf. Would have been simpler to just have a larger bag on the frame but the pack is so comfortable I chose to use it anyways instead of a kelty hiking pack I also have. I never packed out a real heavy load with it but had about 45 pounds on it a few times and I believe it can haul more than I can realistically carry.
I am likely going to sell my 28 and get a 38 or possibly even a metcalf. I like the pack a lot but think the larger bag will be more useful for the hunting I do