My DD's daycare has a very narrow view on toilet training and I can just imagine the looks I'd get if I asked them to EC her as a 12mo (she was older when she started there). However, they do offer to sit toddlers on the toilet at each nappy change for familiarisation purposes. Perhaps something like this could work for your LO?
Also, I'm not sure what is available where you live or whether you use cloth or disposables, but here in Australia Huggies sells both pull ups and 'nappy pants' (diaper pants). The shape and fit are exactly the same, but the pull ups are less absorbent (won't hold one of those flooding toddler wees). If you opted for something like the nappy pants, the carers would be reassured that there wouldn't be leaks like there could be with trainers/pull ups, but offering the toilet is much easier than with normal nappies/diapers.