not much help on tips to plow gravel, as my experience is, unless its frozen to the ground, your always going to be pushing a lot of it with the snow, as the snow likes to roll and snowball effect happens and it picks up gravel as you travel pushing snow, and from my experience,. trying to lift a blade an inch or two, only ends up with thick hard pack snow that turns to ice and takes a LOT longer to melt then, making hills slick,
god news is grave, doesn;t get damaged by rock salt, HAHA< as that hard pack snow turns to ice, lots of rock salt on hand can at least speed the melting process down, or been my best way of solving it!
NOW< what I will add as a tip here is,
I would suggest maybe if in off season looking around and trying to find some good double ground road millings, and get rid of the gravel al;l together, they work much better at driveway making than gravel does IMO
it seems to pack tighter and stay in place better and longer than gravel, and if your super lucky, many times it can be found cheap or even free, pending what road work near you is doing with them, , BUT sadly some places there illegal to be used, so, check regs first! But I gave up on gravel driveways here due to too much work in spring time, from plowing them!
Millings are not perfect by any means, but a lot less work come spring time in my experience on clean up! Call it food for thought!