Seems like we all have the long distance daily tow T Shirt.
For a number of years we have driven virtually non stop , 350 miles from Northumberland to home at the end of our Scottish tours.
The actual driving mostly motorways is not too taxing. It needs an early to bed the night before. Getting the caravan ready, ie removal of security stuff etc. Never felt knackered afterwards.
For me it’s not the driving but the hitching and pitching.
Looking at the OPs proposal I have to ask is there any time available for,R&R and sightseeing?
Or is this a sponsored how many towing miles can I do in 3 weeks?