The absolute fastest way to process all my stuff is to run along a single line of kegs holding down the right mouse instead of maneuvering in corners of kegs. (Aside: I've noticed if I try to pick up the wine and put the starfruit in at the same time by running, it skips every 5th keg. So now I make two passes; one to run along and grab the wine and then one going back to put the starfruit in).
That's why I put kegs in sheds. Same for preserves jars. They are perfectly-sized for arranging them in rows instead of columns. You right-click off the map with your fruit/veg as the active item and it gets most of the ones above and below, filling most of the ones below as you run past. Hold down the direction key when you hit the end (if the end is 3 kegs like a full big shed could have) until all 3 of those kegs are full, and then when you go back the other way, on your way past, you should collect everything else and fill most of them. Just double check quick, but you won't miss many.
When going vertical, you need your mouse to go over each keg as you pass them or to be pushing both the up/down to move and the same direction the keg is in (almost as if it you were trying to move diagonally into the column of kegs, slowing you to a walk). Horizontal just works better. Oh, and with no lights, no nothing but kegs, you can get 137 of them processing in a big shed. I usually put a lamppost in each corner and a chest inside the door (to hold stuff for putting into the kegs/jars) reducing that to 132 per shed, which takes up a lot less space than that on the farm.
I use tea bushes, which are cheap and get you tea leaves, in place of fencing. Well, except at gates, a fencepost on each side and that's it for fences on my farms.
