I would day to avoid planes places that people usualy use use, as trenes ir trees and spots near the south and east "walls" of the caves.
Use Sports spots in the middle of the respawns respawn and mark them, them on your minimap; stack gps until It it is hidden and then put over It some item that is everywhere on the respawn, if there os is not any, you can use moon flowers (put them around the respawn aswell).
To drag loot bags.. there is not good advice I can tell you, It is about Lucky. Always I has have do It I use a simple bag with the loot backpack inside, then I use a "Big mount" that convers It when I step over, and push It carefully lol. If you can can, ask for a Friend's help to go ahead and tell you if someone is near near, so you step over the bag.