I need the reverb to be placed into the soundbites themselves, since
I'll be exporting those soundbites to become the tracks of the CD.

In this case you'll need to do a bounce to disk then, rather than a
merge. Again, there are two ways to do it in DP. (1) Make your last
insert post fade & place the reverb plugin in that insert, with the
wet/dry mix determining the amount of reverb. The decays will trail
into the silences. Bounce that track to disk. (2) Send from your audio
track to a post fade aux which has your reverb inserted fully wet. Set
the amount of desired reverb with the aux fader level & set the output
of that aux to match that of your channel containing the audio clips.
Select both tracks for the bounce to disk operation. Same result,
slightly more effort, which in this case yields you no real benefit.
With multiple tracks to mix, this would be a preferable approach.

Yes, each soundbite I'm creating, of which there are upwards of a
hundred, will become a track on the resulting CD.
So, in short, this isn't a typical mixdown kind of scenario.

It was confusing because in Digital Performer a "Track" refers to a
linear mono or stereo audio 'voice' containing soundbites arranged in a
time line. In your case this one Track will consist of what will
eventually become numerous CD "Tracks". Same terminology to mean
different things in different programs.

Scott Fraser