Hello David
Good to hear from you.
You are right, not many hills in Holland. However, I will be taking Mary Ann off her mooring on Kielder Water next weekend. There is a steep(ish) hill from the yacht club up to the main road, but I do not expect it to be a problem.
I expect the auto transmission will mask the lack of the low ratio transfer box which the Disco had.
I do have a full size spare.
Where does it say that you can not use the temporary spare when towing?
I have checked the handbook, (Section "Wheel Changing" - "Important - Use of Spare Tyre") it does not place a restriction on use when towing.
I do know that some manufacturers do specify that you must not use a temporary spare when towing, I do not know whether LR do or don't.