I too am sorry for your loss and hope the move goes well. We did a big, after twenty years move a couple of years ago and once our much loved home was emptied of all our possessions I didn't seem like our home any more.
I agree with the packers that anything on beds including the linens would be boxed and put on top of the beds at the new location. This meant everyone's bedding, jim jams, reading book, etc was on their bed ready to be sorted at the new house.
Label all keys before you go. Keep a cleaning bucket and hoover to hand. Cleaning and windolene wipes are a god send when you move and a roll of black sacks.
Take photos of meters so you have evidence of the final readings. Do that at new house too.
Do a big on-line shop to be delivered to the new house the day after moving day.
If you can afford it, book a hotel for the first night to give yourself time to get sorted. If the money goes through late it's a brilliant back up to have and if it's all going swimmingly you can cancel before 1pm.
I packed tea things. Movers were young men, they wanted water and cold drinks.
Change for meters if you have to park near agent and have a wait for keys to be released.
Wishing you a successful move and much happiness in you new home.