I can't speak for all the different ALS charities, since they are independent, but as a charity their financial statements will be available. For example, my province's ALS charity spent about $500k last year on equipment loans, while research was only about $20k through donations to ALS Canada. The ice bucket challenge donations were mostly donated for research, as that is what people were expecting to be donating for, and they only have so much patient support they need to give in any year.
I have a family member with ALS and can confirm that they have done a ton to support with various equipment needs and finding the right equipment for them. Support caregivers are only partially paid for (though I can't remember whether that is through the charity or the province).