Hi Joni,
I think most of us have worked with a PT like this one.
Let the PT do the transfer - wheelchair to toilet and back over and over again.
As the OT, focus on the function, don't do "toilet transfers" work on "toilet management" which includes the transfer but more importantly the clothing management (including diapers), hygiene (througness, abilty to reach to clean, and for females- wiping back to front), flushing the toilet, reaching the toilet paper, teaching adherance to any body mechanics/spinal precatutions/hip precautions, timing to prevent incontinence, adaptive equipment and modifications etc....
Good Luck!
Cheryl Hall OT
http://www.occupationaltherapytoolkit.com/
Treatment Plans and Handout for Adult Physical Disabilities and Geriatrics