Sorry, but this might be long-winded. I've been down this road......
My driveway isn't large or long, but I have no place to push snow; a blower is really my only viable option.
I've run a front-mount snowblower on a gravel driveway for 22 years. Had an antique walk behind 11 years before that.
First 10 or so with a John Deere 425 Garden Tractor with a 48" blower. Rest with a BX2360 with 48" blower.
To me, the MOST important thing with a blower on gravel are the shoes.
I really liked the shoes on the JD blower. They were outboard to the housing, and had several bolt-hole options in the blower housing and the shoes for placement.
Various arrangements of the shoes changed the height of the blower's cutting edge to the driveway.
If you look at
@mcmxi picture at post #9, and
@CAPT Seabee picture at post #13, their shoes are outboard to the housing, which is great. However, the shoes are "slotted" to allow changing cutting height. These are both much larger blowers than my little 4-footer and a better design than mine.
I still don't consider ideal, as the "slots" can allow the shoes to slide up if not paying attention. Not a deal-breaker by any means, just pointing it out.
Early season, I leave about 1.75 inches of snow with the blower to help build up a base. I can then raise the shoes to only leave 0.5" or so once a base is there.
A Counter-Point to the slotted shoes is that they are MUCH easier to adjust cutting height in just a minute or two. Mine are slotted, and it's easy to do. I keep a couple pieces of lumber at 1/2, 1, and 1.5" thick I set the blower cutting edge on to use as "Spacers" to adjust as needed.
The other part related to the shoes is what the gravel/stone driveway is like. It can be a challenge if the gravel/stone is not frozen. Shoes can dig in while running in "float," and stuff starts to get tossed around. You might see the same on occasion with a plow and the shoes dig in.
My BX2750D blower has long since been superseded by "improved" models. Wasn't ever happy with the shoes. They were inboard and would dig in regularly. Poor design IMO. I modified them a couple times to gain surface area on the ground and also lined them with UHMW so they didn't scratch up my patio. They've been great.
I see you're in WV. Do you normally get a wet/heavy snow on top of a thawed/loose stone drive?
Not insurmountable but makes the shoe design that much more important.....
The other commonly debated option is a rear-mount blower versus a front-mount. Like anything else, there's pros and cons for both.
I often have the front-mount blower and put a box blade or rear blade on the 3PH.
Again, apologies for the long dissertation. But like I said I've dealt with a gravel drive and snowblowers for a long while.....
Good luck.