He does have good connections but the reason those teams agreed to games was not because he knows them, but because Iowa has been good enough that the likes of Okie State and UC Irvine are willing to play Iowa. Those teams know playing Iowa likely won't be an RPI killer for them.
The conference schedule Iowa literally has zero control over. When you are in a position to win the regular season title, having an easy schedule would help. In 2015, Iowa went 19-5 in conference, which about 80% of the years would win. Problem is Illinois went 21-1. In 2017, Iowa was 4th at 15-9, Nebraska won at 16-7. If CJ Eldred isn't lost for the year with an injury, Iowa probably wins the league.