Hmm... I see you have discovered the Prius II magic Wayne :-) Remember the 1000 mile tank we talked about last year? Perfectly doable if you run the car non-stop. But no sleep for 24 hrs of course :-)

Now about gliding, in places that are not all that flat, it would really help if you find a route that has strong climb and gentle slope down. You can then do all the climbing in one go and then glide for a very long time. The opposite would be quite bad because you need to pulse a lot to go up the gentle slope. Every pulse has a startup cost, you really don't want to do it very often. And also the big downhill will require you to brake too hard to regenerate much of the energy.

That's way route choice is very important here. I have evaluated alternative routes extensively for most of the places that I need to visit on a regular basis. My wife always get really upset when I take all these strange detour :-)

Andy