Here are maps and diredtions to Ike's Tract.
On Hwy 30, just WEST of Tama, between Tama and Marshalltown you will come to H Ave. There will be a farm with a white fence on the S side of the road, and you will take H ave to the N. About 1/2 mile to the N the road turns to the right slightly. One the right side of the road, is a sign shaped like an arrowhead that says Ike's tract. This is the driveway (driveway heads East).
Here are some maps.
GPS coordinates are:
N 41.59.962
W 92.37.365
Another set of Lat / Long.
N 41.99784
W 92.62450
Let me know if you need more info!
Aviator