This is what I have for 1A
District 1
West Lyon
Hinton
Lawton Bronson
MVAOCOU
Ridge View
Alta Aurelia
District 2
Emmetsburg
Pocahontas
Manson NW Webster
East Sac
SCC
Clarion Goldfield
District 3
GHV
Central Springs
AP
Grundy Center
Hudson
Waterloo Columbus
District 4
Union
Jesup
Sumner Fred
MFL MarMac
Beckman
Cascade
District 5
Lisbon
Camanche
NE Goose Lake
Regina
Durant
Louisa Muscatine
District 6
Cardinal
Sigourney Keota
Eddyville BF
Pleasantville
I35
West Central Valley
District 7
South Hardin
Odgen
Panorama
West Marshall
South Hamilton
Eagle Grove
District 8
Missouri Valley
Shenandoah
Red Oak
Treynor
Underwood
Tri-Center
Here is my analysis and reasoning.
District 1: West Lyon is actually kind of on an island, but I think Geographically it makes the most sense to put the other 5 with them. West Lyon, Hinton and Ridge View I think all should be tough, but that is NW Iowa football in 1A/2A.
District 2: Sioux Central actually dropping down did mess things up geographically but I think that this still works. The last two years this district has probably been the weakest, and it probably still is, but I do think adding SCC who is always well coached, and CGD who is a 2A drop down and very young last year makes this district stronger. You could put Eagle Grove instead of CGD but for balance this makes much more sense.
District 3: This district on paper may look a little weird, but the way the map came together, this made the most sense. You have the 4 schools on the western part of Waterloo, and the two Mason City area schools, overall travel isn't too bad. I also think Grundy separate from South Hardin and West Marshall which makes sense balance wise.
District 4: This is essentially the NE Iowa district. Jesup and Union would probably like to be with the other 4 Waterloo area schools, but on a map this makes the most sense, and Bellevue not being a 1A school kind of messes up district 4 and 5.
District 5: Unless the state moves Beckman and Cascade to this area instead of the NE part of the state, I don't see how this isn't a district. Plus I think with Regina and Lisbon you have 2 of the top 20 or so teams.
District 6: Again I think that this is a district that makes the most sense on a map. Sigourney and Cardinal to West Central Valley is a bit of a haul but mostly on 4 lane. Balance wise I don't maybe see any dome contenders but 3 or 4 teams that could win a playoff team. And losing Bellevue sent a team like SK west instead of east.
District 7: This was probably the last district I put together, I like it because of the balance it creates, I view South Hardin as a possible top 5 team, and separating them from Grundy creates balance, but there is still West Marshall and South Hamilton who are always strong.
District 8: If there is a district that I would bet my house on it would be this one. Geographically it is perfect. I do think that with Underwood, Treynor and Tri-Center you have three very strong teams but again I don't see how you separate them.
This map came together in this order 1,8,6,5,4. Then I was left with 18 schools to divide up, and I tried to separate the top teams while having travel that still makes sense. I do think there are some different things you could do mainly with the eastern part of the state, but this is what I went with for my best guess.