I use Safeway's grocery delivery service at home so I knew that was what I wanted to do on our trip last year.
I called DLH and asked for the bell desk. I asked them if they would accept a grocery delivery from Vons and they said they would, however I would have to return to my room in order for the bell desk to bring my order up. The Safeway delivery guy is not allowed upstairs.
It worked out great. On our first day we checked in early (10am)at DLH, got to the park around 11am. I scheduled my delivery between 4-6pm. The bellman called me around 5:30 and said our delivery had arrived and was I heading back soon. We planned on heading back to rest and eat dinner around then anyway.
We went back to our room, i called the bellman, he brought the order up and I tipped him. He said it was a great idea and he didn't know why more people didn't use the grocery delivery service.
The fridge was small which I knew ahead of time so I was careful not to order too many perishables. We ordered milk, yogurt, cereal(the small kellogg's boxes), coffee, half and half

bagels, sandwich bread, lunchmeat, fruit, waters, snacks, sodas, juice boxes, paper plates, napkins, plastic utencils, plastic bowls and Gatorades.
And silly me! What was I thinking? I should have ordered beer and vodka!
Before we left for DL I placed my order on Safeway.com, after I changed my user profile address to DLH's address the screen changed to Vons.com.
It is still the same, just SoCal version of Safeway.
For the comments box I added my cell phone number and put instructions for the bellman to call me when the order arrived.
We will do it again for our trip this year. We are staying at PPH this time. I already called the bell desk there and double checked that they will accept it.