We just used them for a big grocery delivery to BLT. Everything was great and yes, they deliver to the Contemporary where it's held by Bell Services. In our case, I had it delivered around 3pm but we didn't arrive in our room until after 5pm. Bell services held it in their refrigerator and freezer until we checked in and called for our bags and groceries.
I forget what I put as the address but I thought there was a drop down menu with the BLT listed (not sure about this). If you're in doubt, call GardenGrocer, they were really helpful.