Large packs like the ILBE, Bergen and ALICE are great of you have a basecamp and only have to move your shit for a few hundred meters and have a place to stash them. You wont be able to move far or fast or fight with one on.
Sleep comfort is important and depending on the season the priorities are different. In the fall/spring you need to stay dry and warm. In the summer its easy to stay warm but might be hard to stay dry without overheating and bugs can really bring down your morale.
During no nods we got rained on most of the evening/night and after being wet and tired, not being able to escape the bugs was really getting to me.
Sleeping pads are extremely important not only for comfort but most important for insulation, I see a lot cut here and suffer for it.