I've used
Amazon Prime Now the last several trips. It is a little odd ordering some items from Amazon and some from Whole Foods, but I've been pleased with the deliveries. Also wanted to mention that Walmart has a fee that is about $100 per year, and that gets you free grocery deliveries as well. I haven't used it, because I do grocery pickup, but it may be am alternative to Prime Now. And though I do use Walmart grocery pick up at home, I would be a bit hesitant to do so on vacation, since the app doesn;t update in real time, and most of the time there are substitutions I wouldn't want to deal with on vacation with a large group.