For a lower tech - free map option that works well - check out:http://www.digital-topo-maps.com/
On the main page pull down and to the right to get to the free printable maps option. You can drill down into your state, to a up close level, and have 3 views, map, topo, and hybrid(satellite image).
The topo's are the older USGS type topo's but I like those myself - plenty of detail.
You can easily find deep north/east hillside hollows that are quite remote, and river bluff and steep hillside areas where the soil is rock chip filled and grows nice seng.
Then go and check with the landowners and see if you can get lucky.
Here is a example of the Topo view of a random spot that I just looked up.
That is the kind of place that I would like to go hunt.
No doubt around that river bluff and some of those deep hollows there near the river with north/east facing hillsides there would be some nice patches of seng.
PS - when looking at these maps north is at the top, south at the bottom, east to the right, west to the left.
That hollow just off the river to the left that has Mile 105 shown on one side - it is more remote than many of the others there and it has a real nice big hillside facing almost due north, with just a slight north east turn to it and it is deep and well that is the kind of place that gets my attention. Would sure like to get in there and look around some.