Following a suggestion from John Kuras, I invested in a set of Powell Peralta 64mm Dragon Wheels.

Even though they're 93a hardness, so technically softer than the Carver 95a Park Wheels I was using, I definitely found them faster and smoother! (Apparently it's something to do with the rebound on the urethane. Whatever...)

I wanted to try them out on the bowl I usually skate in, but unfortunately the drain was blocked and it was more like a paddling pool, so, instead, I tried them on the mini-metal half pipe.

Here's some video of my attempts, both frontside and backside https://youtu.be/MeBpABRdjqg

I'm a bit out of practice (been doing more surfing!), so I still need to work on the timing of the transitions, but John K also suggested adding a bit of "lift" from the back toe which I did find made a difference and I got further up the slope than I'd gone before.

Ok, so (yes, Clay, I know!) I still need to get my head lower, but I'm planning on getting to a different park with a better bowl hopefully next week, so maybe I'll be able to work on that there.