The pads will probably settle over time with the MH on them. What I did was get large stone, two inch minus, and pack it in for a base. Then I put three quarter minus over it and packed it down. I still get a little settling, but I can just fill in with more rock.
The minus means I get the stone screened for no larger that three quarter, but I get everything smaller including the powder. That is the binder.
You could also just use powdered granite. It packs really hard.
Retired FAA ATC, VFW, LEGION, NRA (Life Member)
2002 Journey D L 36, 2013 Demco KarKaddy III,
Toad 2012 VW Passat Diesel
Lost little Bitzy
New kitty named Oreo.