I have a mile long gravel driveway. Been maintaining it since the day I had it built in '82. I use three implements - Rhino 950, rear blade, 96", 1100 pounds - - Land Pride GS 2584, LPGS, 84", 796 pounds - - Bush Hog, ROBB, 72", 720 pounds.
I will use the rear blade about 99% of the time. It's not an easy implement to learn but is, by far, the most universal. Grades, cleans the ditches and returns gravel to the driving surface, maintains the crown, plows the snow & moves material, to a limited extent. It will not scarify and repair potholes.
I will use the ROBB or LPGS to repair potholes( both have scarifiers). The ROBB( roll over box blade) is the implement to move material from here to there. If I put my 480# square of concrete on the LPGS - then its heavy enough @ 1275 pounds to smooth any ripples I might get.
The ROBB will not clear snow, will not maintain crown with this implement, will not clear/clean ditches. Too light to do any meaningful grading on the driveway.
If you have a "wonder gravel" driveway - the LPGS is the easy implement to use. It can be heavy enough to smooth ripples and with scarifiers can begin the repair of potholes. However - it will not plow snow, WILL NOT maintain a crown on the driveway, will not move any material, will not clean/clear the ditches.
BTW - the surface 4" of my driveway hardens like concrete after the spring rains. It's a combination of gravel, sand, silt and volcanic ash( Mt St Helens, 1980). I had a Land Pride RB3596, rear blade, 96", 565 pounds. Excellent for snow plowing - just a great light show after the driveway dries and hardens. Drag it down the driveway in the early evening - better than a fist full of sparklers on the 4th of July. Sold it - got the Rhino.