Given what you've said here I would say have at it. 2.5mg is a "healthy" dose of clonazepam, obviously not anywhere near the top of what's said on these boards, but enough to make most people pretty sedated. The stigma of combining opiates with benzos deserves most of the respect it gets, as it can get dangerous pretty quickly. But common sense is your friend here, pace yourself, you can always take more but not less blah blah blah.
Considering you are on the Clonazepam daily, your tolerance has got to be decent. I wouldn't recommend to one of my straight friends on a first time whim to take a Vic and 2.5 of kpins. But the tolerance from your daily (prescribed?) dose should keep you in the safe zone.
I myself am prescribed Clonazepam, 1mg twice a day and I go through periods of heavy opiate use and as I can tell I'm no worse for wear. Your story or body might be different but I really wouldn't hesitate or worry about this either separately dosed or spread apart. And I just though of how long Clonazepams half-life is but I just don't really think it's all that relevant in this situation. Anyone disagree?