First of all Obrienp- do it. Mine has been an absolute game changer. I was thinking about getting a louder amp before using a HPF, as it was running at full tilt all gig, every gig, now I’ve actually got some headroom to spare.
secondly, I’ve placed mine as the last thing in the chain, just before the amp. I tried it at the start, but my envelope filter didn’t quite react the same so I moved it. Try it in different positions and see what works best for your setup.