According to the drought monitor, most of the area is out of the official drought. It's abnormally dry still but not significant across the region. As @CAPE sort of implied, this time of year (and basically til April), soil moisture doesn't really have much of an impact on the flora of the area since it is dormant anyhow. And the low sun angle and cool temps means any soil moisture sort of just sits there until spring.
The mistake you're making is assigning the "low reservoir" level to some sort of natural phenomenon. The only reason there are low reservoirs is that humans created them in the first place and sucked down too much water. We basically created our own problem. The trees in my yard don't give two shits about whether some DC reservoir is "lower than normal" (normal in this case isn't an actual thing since it isn't a natural process). The problem isn't too little rain, it's too much demand.
Random anecdote. I am on well water at my primary residence in Calvert county. For the past 20yrs I've had a hardness of about 17gpg. This year all of a sudden my hardness has increased to 30gpg. I've had to buy a new softener with a higher capacity to deal with it. Maybe it's due to the drought, I have no idea. But if it is, it's not nature's fault, it's a side effect of humans tapping in to an underground aquifer.