I've done this on and off for years, and we're all still surviving.
I found there is more stress - you are responsible for everything those days (and nights). You are never off duty and that can get unrelenting. And it's you that has to fix it when one child throws up and has to be picked up NOW and the other has a piano exam in 30 minutes....
In terms of the to discover support machanisms that make it all work.
But, as pointed out above, you are still a couple, have an intact income and none of the trauma of a split-up. You can be very ruthless in telling Daddy he's got to take the children away for all of eg Saturday morning, so they can reconnect and you can do something else. You will also need to make sure you find a way of keeping Daddy up to date on goings-on and routines - it's amazing how fast things can change and the potential for one or other of you feeling undermined can shoot up if a remark is interpreted as criticism.
Children cope fine - they know about Daddy's job and why it's important. They've visited him there, and we've been matter-of-fact about "this is how it's going to be", and they've always adapted well to changes to his working patterns.
I think the times they've said "I miss Daddy" can be counted on the fingers of one hand, but they are excited when they see him especially if he ever does get home mid-week.
The main reason we do this is so the children can stay in the same school at primary age and stay with their friends. If we had not done this, they would have had to move four times, and probably would not have seen that much more of their father owing to his long and variable hours.