You can buy just about everything frozen these days, so why bother even making anything this year ? You will have plenty of things to worry about before you go.
What about asking the rest of the family to bring something? Forget the turkey and go for a chicken (or 2) that can be defrosted overnight - just remember to either stick a big not on your fridge, or a reminder on your phone.
Bread sauce can be made on the day, from frozen breadcrumbs - or the packet ones are quite acceptable, I have found!
Everyone will be aware that you will have been away, so they won't expect the usual Mary Berry standard, but even so, if you take a few shortcuts, you may be quite surprised!