Comfort is far more important to me than fuel economy. Pulse & Glide is something I do when it's easy and produces the results I want, and I don't bother when it's not going to be very worthwhile. If I'm hot, I ALWAYS leave the A/C on, and I avoid doing anything that will stop it.
Hills make P&G easy, as long as you take advantage of them properly -- glide down, pulse up and over.
It's pretty close to natural behavior anyway, doesn't hold up traffic, and maximizes the savings by running the engine more efficiently (look up "BSFC" and pumping losses) while keeping a steady speed that's good for aerodynamic drag -- if you pulse down and glide up, you have to go really fast down, and aerodynamic drag increases as a square of speed, as does engine friction which you'd have more of at the higher RPM of the downhill pulse.
For your highway driving, what if you configure one of your Civics specifically for highway with higher gearing and aero mods?