We just stayed at the Hilton this weekend, right next to the Convention Center. I had my GPS walking app running out of curiosity. It was about 1.3 miles to get from the Convention Center to the Grand lobby. It's not bad at all, but with a lot of packages it might be a pain. Also, with the Expo being in August, it's usually around 80 degrees. I don't know if they will deliver things, probably not.