That's an ambitious drive in that time, 3000 miles in 8 nights (did I count this right?). I've done a few really big tours over the years, one of the first was 4.5k miles in 17 days, on the single night stops, we always arrived knackered then set off next day for a destination and, even staying three nights it was drive all day, 1st night knackered, second day/night, bit of sightseeing resting, third day, just about recovered before an early bed and off again the next day and so on with a mixture of 1, 2 and 3 night stays.
We needed a holiday after it! Bearing in mind we always, apart from once arriving in Newcastle, had a big drive/overnight from a Channel port. In subsequent years we've done bigger trips but took 3-4 weeks with very few one nighters.
I wish I had your energy, as the last thing I'd want to do after your first part, is thrash about round the Ring for a few days
I much prefer a more relaxed GT type tour with shorter journeys in between longer stays, there was one year we even went to Portugal for the day from Northern Spain, (A' Caruna, to be exact), just to bag another country , before heading back over to Pamplona
Good luck anyway and I hope it all goes well and you stay safe