You could of course use your Crybaby as a wah pedal into the guitar in. Or if you prefer to place it anywhere in the signal chain, use the HD's FX loop.
Personally, I use EXP 2 with a Mission Engineering EP-1L6 to tweak five or six parameters at a time. It's bugnuts fun to crank the tape delay feedback, drop the delay time, boost the reverb depth, bring in a bit of the sub bass, and nudge the fuzz up a bit—all at once.