I do deads(sumo) after BB rows 3x/wk (M,W,F) and my lower back has held up fine. I think it's really a matter of conditioning , and how you treat your back in between W/O's. I've noticed that recliners tend to give me "old man back" if I've done deads that day after sitting in one for just 20 minutes or so ; so I sit in an arm chair with good posture support while relaxing at home.
One of my idiosyncrocies is that I pace in between sets , walking around the W/O area and I continue this for a good 10-15 minutes after my last rep while my heart rate and breathing return to normal. I can't prove it but I firmly believe this "warms me down" and prevents my back (esp. lower) from tightening up and becoming more sore.
Just to be clear- I get sore , but it's a good sore not an aggravating "did I hurt something?". Nothing will encourage good posture both sitting and standing than 3x/wk deads - thats for sure!
I will usually feel a bit tight but in a good way for the rest of the day I did deads on , then a slight soreness the next (contrasting showers and a small pillow in the small of your back while sitting if your seat has less than stellar support will go a long way to help this) by the following day it's time to lift again and my back is usually feeling little to no soreness at this point.
Truth be told it's my traps and forearms that have been killing me - as, in my search for ultimate "bang for buck" I've taken to doing static holds at the top of each dead for a slow count of 5 deep breathes. I welcome the pain in anticipation of the growth I expect as a result.
I would never advocate "soldiering on" to the point of injury though , you've really got to be able to feel the difference between acceptable soreness and warning pain. It's an ongoing communication between you and your body, I know colby2152 you are an experienced lifter but 3x/wk deads + running + hyperextensions might be a little ambitious.