Yes on both!! You will just need to use a couple of tricks and/or Add-Ons.
I hope no one EVER hesitates to ask a question that seems too "I should already know this" ish, too easy, or even too silly! If it's a question, it's a question, and I love to help you discover the answer sooner rather than later!
I want to make available to my volunteers the dates & times that I have open for volunteering/helping (they would be able to go into this doc and sign up for a date and time . . . edit it). I would like to share these dates with them through Google Docs. If a parent does not have Google Docs how can I share it with them so that they can sign up/edit in this Doc?
As long as you set the sharing permissions to be "Anyone with the link... can edit," people don't even have to have a Google account to write on it!
Just in case you have any pull... It would be nice to be able to have the ability to do a DRAFT watermark in both Docs & Sheets. I use both of these a lot and there is no easy way to do a DRAFT watermark right now .
Haha! You're cute to think that I have any Google pull whatsoever, but actually . . . I kind of do, and so do you! It's a bit of a hidden feature, but now that I know it's there (thanks to Alice Keeler), I use it all the time!!