How to keep dwarves inside mountain even when not under attack

I'm playing on Terrifying
biome, and I have a problem where all my dwarves like to rush outside and stand by the wagon.
I have food, water, and tasks that need to be completed in my mountain fortress. I have assigned most of the dwarves to haul stone, but half just ignores it and would stand outside until they fall unconscious.
Now, besides that, the main problem is how do I tell the dwarves to NOT go outside at all? All the threads I've read about this said to create a burrow, and then put the dwarves on alert, and then they'll run to the burrow. But all this in the context of being under attack.
I just dont' want my dwarves to go outside if they can help it since Terrifying biome causes my dwarves to frequently fall unconscious outside. And also, when on alert, the dwarves wont' do any tasks. They just rush to the burrow point (a 2x1 block) and stand there until I turn off the alert. Then once the alert is off, a bunch of them will rush outside and stand by the wagon or to collect some random thing on the ground.
How can I have my dwarves remain inside without walling off the outside?
Best Answer
Setup a burrow, you don't have to be under attack to use a burrow, you can use them for all sorts of things (segregating certain dwarfs.....).
Just setup the burrow and put it on alert (the civ alert, don't change the military alert) and your dwarfs will stay inside all the time :) You need to make the burrow big enough to cover your whole fortress, and they'll go about their jobs inside.
Also, turn off anything for collecting items from outside in the options menu with O
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How do you activate Burrows?
Hit w to go to the burrow menu and a to add a new burrow. Then hit Enter to define it. Hit n to name it, I'd call it "Inside". Then hit Enter to start a rectangle and enter again to finish it, just like designating areas to dig.How does Dwarf Fortress work?
The main game mode, Dwarf Fortress, consists of selecting a suitable site from the generated world, establishing a successful colony or fortress, combating threats like goblin invasions, generating wealth and taking care of the dwarves.What Happened to the Dwarves of Erebor After The Hobbit? | Middle-earth Lore Explained
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