Hello Brandon,
Assuming you're not overriding logHook (or are doing it properly which sadly many do not), you can just import XMonad.Hooks.EWMHDesktops and apply the ewmh combinator to your config record.
If you're using the bad configuration that too many people point to as a "default" (the big one that overrides literally everything with defaults from a particular version) then there may not be any easy way to do it. That config was never a good idea, for all its popularity; it's a leftover from pre-0.5's hardcoded config.
Would you be able to point me (& others) towards some resources to better understand how to write a "good" configuration? I based my config from the example (man/xmonad.hs) that ships with xmonad-0.11 on Arch Linux. Is an example of a bad config? With my limited understanding, it seems like it matches your description. Best, Josiah