^^I haul my pack up the tree with me and use the sternum strap around the tree so my knees hit the padded back of the pack. Pretty cozy, keeps pack out of the way, and keeps my snacks handy. And no knee pads required.
Heliums are popular for good reason but they are not light. I paid big bucks for a set of carbon sticks that stack without any offset, specifically so it would be less of a pain in the rear, both weight wise and space wise. That might be excessive for some folks, but it was money well spent to me, and I shed something like 4 or 5 full pounds out of my pack just changing to those sticks with a dyneema daisy for straps. For me, the stacking of the sticks was maybe even a bigger deal than the weight—- because they stack vertically with no offset, I can carry them horizontally in the load shelf of my pack, and they hardly stick out wider than my body. This makes them really easy to carry, they don’t snag on brush, and the weight is very centered and low on my back.
Also, I prefer prussiks to a mechanical rope grab. I know that’s not a popular opinion, but having climbed for many decades it comes easy to me, it’s quieter and has other uses in a pinch, and it is significantly stronger. For ease of use without a lot of practice, the mechanical rope grabs are probably better though.