I'm not much help I'm afraid as I have only flown on an A380 once, but it was a CW flight with BA. As I assume this will be an overnight flight try and make sure your seats are as far away from the the kitchen area as you can. The is where the cabin crew will be seated during the quiet time in the flight when everyone will be trying to sleep. We found the constant loud chattering of the crew meant we couldn't drop off to sleep, and that was after approaching them and asking them to keep the noise down.
We flew a return flight from Heathrow and there were independent airbridges for both deck levels. We were on the upper deck and had no need to go to the lower deck at any point. I hope this is of some small help to you.