I run a Lone Wolf sit and climb on my frame with a cargo panel. It works very well. I run a strap on the frame over the stand. When I get to my tree the stand comes off and I put the pack back on and climb. Awesome setup. I have not done this with a pack but I assume it would work well especially with a meat shelf.
I have a reckoning with guide lid and a sit and climb. I just hold the stand on with the lid. I guess I could use the load shelf but you don’t really need it.
I leave the pack at the base of the tree and take the lid up with me.