Strong Back level 3 (and 4). Strong Back level 3 allows you to collect as much as you want! and then you just use AP to move. This is the greatest perk in the game for a Scavenger! When I first saw this perk, I thought you had to push the sprint button to move which is a pain on xbox, but no, you can just move and it takes AP from you.. I wish I had gotten this perk long ago (I'm at level 52 now), it basically means you don't have to worry about what you pick up (or what to drop when you find something better). Combined with the level 4 perk (fast traveling while overburdened) you don't even need to take drugs or change clothes to get back to your dumping base! What a great perk!