I currently have 9 stand locations on my 42 acres. You can't have too many stands in my opinion. You need to be able to hunt the wind. Deer movement patterns will change over the course of the hunting season. Available food and hunters on neighboring properties will all effect deer movement. You want to able to move to where the deer are as their patterns change.

As far as food plots, that depends on how they fit into the overall management plan for your property.