Jon,
Like others have pointed out, if you're going to ask for advice and criticism, you shouldn't be affronted when you get advice and criticism. It's really unclear to me what you were looking for from your original post. If it's "would you stay at a different Marriott from the one I selected?" better that you just ask that question.
I do think that the concerns about amount of time in a vehicle are overblown. I - perhaps more than most - can understand making a seemingly absurd trip to fit in more golf. The really useful advice is DO NOT TRUST GOOGLE MAPS DRIVING TIMES. So long as you have a reasonable buffer in your scheduling (maybe 50% more time), you should be ok.
You really should consider taking advice on where to stay unless the Marriott thing is non-negotiable. Do you care about having places to eat/drink within walking distance of the hotel?
I thought back to the absurdity of my schedule on first visit to England:
Day 1 - Arrive LGW, drive to Pulborough, 18 holes, drive to Rye, stay at Dormy (2.5 hours driving)
Day 2 - Rye 36 holes, drive to Deal (1 hour)
Day 3 - Drive from Deal to Swinley, 18 holes, drive back to Deal (4.5 hours driving)
Day 4 - Sandwich 36 holes
Day 5 - Deal 36 holesDay 6 - Deal 18 holes, sightseeing in Canterbury, stay in LGW area (2 hours driving)
Day 7 - Walton Heath 18 holes (1 hour driving)
Day 8 - return home
So that was 11+ hours of driving (and another guy did all of the driving). Chief regrets were only playing 18 at Swinley, but that was because we wanted to get back to Deal to meet up with GCA people. The schedule wasn't ideal with Swinley in the middle, but that was the only day to play it and I wouldn't have missed it.
Not sure that I "learned" a lot from that trip. I'm still willing to take a long drive if it means playing courses I want to. You should too. But you really ought to listen to advice that can help you (e.g. realistic travel times, stay in a better town, look for a more convenient base, move hotels one more time, etc). These have nothing to do with your golf preferences but all to do with making for a less stressful trip.