Sorry I can't help much, but I did a few searches and found the -
and if you do a search on SAE Micro Aero in - http://www.youtube.com/
there appears to be quite a few SAE related videos.
One last check, scroll down this page, there is a 'Similar Threads' list, there may be a thread there that helps.
For grass take-offs and landings, larger diameter wheels are more important than how narrow, actually very narrow wheels could cause a problem, wider wheels will ride over the grass easier.
If you find a 'design spec' for the SAE RC Aero Micro Class, post a link, as knowing exactly what the requirements, limitations, are is needed to suggest any designs.