I doubt that the weight of the equipment would be an issue but how much can Kilcif cram in his backpack? Also will any of the weapons go into the Quiver of Ehlonna? I know that the quiver isn’t really meant to handle some of these weapons found but it does state that it acts as a quiver or scabbard.
Also if he cannot carry everything he will pack the light armor first starting with the Mithral chainmail. Depending upon your answer we can edit the equipment list OOC.
Also I was under the impression that with all the descriptions given there was no traps or chance for an ambush if that's not true I'm more than happy to edit.
Nobody ambushes Kilcif while he collects his Christmas presents. Using some rope, you'll be able to bundle everything onto your packback (even if everything can't fit inside the backpack).