Playing one game against an SEC team at their stadium won't mean much of anything in terms of recruiting in that state. Kids choose team for a number of factors, including proximity to home, winning, playing time, relationship with the coaches, and others. Look at where Iowa recruits. Mostly Big 10 area, with forays into Texas, Florida and the East (New Jersey/Maryland). The kids we pull out of Texas are the ones that aren't offered by the big boys in that state. Rudock is an exception only because Miami didn't offer until after they hired Al Golden. Had Miami been involved with Rudock from the start, I doubt Iowa gets him.
With the move to 9 conference games in 2017, and if Iowa State is still on the schedule, I guarantee we will not be playing any other BCS conference teams out of conference.