Seeds have nothing to do with host sites. Seeds only determine who gets a first round bye, that is it. Sites are determined by who is willing to host games, and the state also wants sites with bleachers and ability to control the crowd, i.e. make sure everyone pays.
The advisory committee asked that first consideration be given to full size fields, but at end of day they have to use fields from schools willing to host that are within reasonable geographic locations.
If there was a field, whose school was willing to host, and met those conditions, then have coach or AD contact the IAHSSCA and it can be brought up when they meet with IAHSAA