I probably won't be much help. We were faithful Garden Grocer customers up until our last trip when I used Prime Now. Of course I don't know if you are a Prime Member; but a YouTuber I follow used it for a trip and it looked like it went really well. You can order with much shorter notice and get your stuff in 2 or 3 hours. It's free delivery if you order $35 worth of stuff. The tip is added for the driver, it's usually $5.00 depending on the price of your order.
Garden Grocer has always been great. Prime Now was great. I built my cart, then once we were sure of our departure time at the airport, I put in the arrival window and placed the order through the app on my phone. I use Prime Now at home as well at times and the only thing is there are times when what I want isn't in stock; but that is rare. Probably wouldn't have that issue with Garden Grocer though. I know with Garden Grocer if I only want a few things and my order will be less than a certain amount, I'm not likely to use them because you have to order a certain amount for free delivery and it's pretty high last I checked. Our last trip was much shorter than our previous ones so Prime Now was perfect. This trip we will be back to our usually week plus length of stay but I think we will still get breakfast items, snacks, bottled water and other drinks.