I'm only 13th level and I find myself having to constantly shed items because I can't carry much more than a crippled hamster. By design? Could be.
How are you investing in your special? Early on I feel its good to invest in Strength and Intelligence. Strength gives you the carry weight, and INT gives you more Exp to rank up. I'm at level 16, and so far I'm leaning towards a rifle build, though up till now I was closer to a pistol build due to the fact that you get somerset special revolver.
Anyways one thing you can do is "scrap" your junk, that is go to a work bench, select scrap, and hit the T key. That breaks down the junk to baser elements. You can also scrap your weapons individually that way as well and this help maintain your carry weight. My carry weight is currently 175 and I easily have 120 to 130 without any junk.
Since food and water are no longer needed, that is you don't incur health damage if you go hungry, I don't carry any of that, and I try to only keep no more then 20 stimpacks on me at any one time
How does the scrap box work? Does it automatically scrap whatever you put into it,
The scrap box only works with junk, you can't throw weapons in there to break them down, but any junk items automatically get broken down as you place it in there. In the stash box you can keep a typewriter whole, but in the junk box, its automatically broken to its baser components. The biggest thing is that its unlimited, my main player has 20k steel, 20k lead, 1800 acid, etc etc. Starting off the game where we have so little components to use, its less of a draw.
One question that is not obvious to me - when crafting do you only have access to the scrap on your person, or is your entire stash/scrap inventory at your disposal? Is it different in CAMP or permanent workshops (like the race track near Vault 76?)
Yes, if you have a camp down near charleston, but are at a workshop near the racetrack you have access to all of your components to build what ever you want. it used to be, that if you had the stuff on you, could you build something but now its what ever is in your stash, regardless of location.