If you are checking a bag I would not expect it to be picked up for you after 10pm. Go and get it yourself before you go to the DME area.
In fact after my last experience earlier this month I will never again tag a bag for DME pick up unless I'm arriving before 3pm. My flight got to the gate at 7:20pm and my bags did not arrive at my room until 2am. I was in my room before 9pm and by 10:40 I called luggage services to see if they knew where my bags where. I was told that they where scanned at 9:30 as being on the truck and that I should have them within the hour. Ok, not too bad as I expected to have to wait until midnight at the latest. At 12:30 I called again and was told that at 11:45 they were scanned as being on the truck. What??? The CM that I was speaking with was great and apologized for the incorrect info from the previous CM and said my bags could be held until the morning so that I could go to sleep. Unfortunately, there was something in my bag that needed to be in the fridge and I didn't think it could wait any longer. I told the CM this and he said he would do his best to get them to me the moment they arrived on property. So along comes 1:55am and I finally hear the tap tap at the door. On all previous trips we had our bags within 3 hours max of landing. I know that the info states it's 3-4 hours from the time you check in. This trip we checked in around 8:40 so I think 5+ hours is ridiculous.