I'm not sure this would be allowed as practice games should only be started based on info available on turn zero (I think).
Do you mean not allowed as in "this violates SGOTM rules" or not allowed as in "we don't know this before we start, so our practice game would be invalid"? I don't think there's a rule about the former, and want to be clear what I mean by "practice games" with the following:
I guess I was thinking that before the first couple turnsets, we could run some quick tests to see what a good opening strategy would be. This would answer questions like: timing of techs, what tiles get worked, whether the worker gets bored or has plenty to do, whether AI warriors will pillage our mine, etc.
After that, we'd run the first couple turnsets.
After that, we'd know where Horses and Copper are, then we could do actual test games where we have whatever resources we actually do have. (This would fill everyone's Christmas vacation

!) That way, we're not planning an axe-based defense when we only have access to Horses.
Edit: I agree with Ruff...turtling won't be our approach to AW. I'm hoping some practice games, and some research on existing SGs or RB events, will help us know how to proceed.