As far as number of trophies taken (with data)...Allamakee is #1 big buck county in the state, year after year...
Here is the data to prove top 5 counties in iowa
"Allamakee County in rugged northeast Iowa, leads all other counties, with 416 qualifying racks. Marion County, with rolling hills bisected by the Des Moines River valley, has the second highest number of entries: 305. Clayton County, along the Mississippi River in northeast Iowa, put 288 entries in the Registry, while Warren County, again in south-central Iowa, claimed fourth place with 282 trophy racks. Jackson County, along the Mississippi River in eastern Iowa, earned the fifth spot with 273 entries."
lots of good ground anywhere you go...I love southern Iowa personally! Hope this helps...