i am planning a holiday at the end of september, around the 21st, for 2 weeks. the only idea at the moment is to fly in and out of seattle. possibly looking at driving to yellowstone park, but i am concerned about the amount of driving this might take and don't want to bite off more than i can chew, or waste alot of time on the road, although i do like driving and getting to see varied landscapes etc.
4 drive - spokane (mainly on I-90, but maybe hit a bit of I-2 to make a more interesting drive)
5 drive - missoula/butte/bozeman, depending on fatigue
6 drive - yellowstone
9 drive - around american falls ID, or arco ID. is it worth seeing the craters of the moon monument??
10 drive - around boise ID
11 drive - route 20, around burns OH
12 drive across to newport
13 drive up the coast towards olympic national park
14 around olympic national park
15 fly home
i have driven in the US quite a bit, and the best part of past holidays have been the drives and getting to see places off the beaten track. this is just a very rough idea i have come up with, looking at a map, but any advice would be welcome. i have visited seattle and driven down to san francisco before and hit portland and mount st helens on the way. my partner has never visited this part of the world though, but i'm not bothered about seeing stuff again, i love that area.
another consideration is what is the weather like at the end of september/first few days of october. i've only been in july, when it was very hot. are there many road closures this time of year?
should i consider a different route from seattle and forget about yellowstone, so i can have more of a flexible driving trip? would gas money be enormous for this trip?
any advice would be great, i always find it hard to judge driving distances in the US. the reality of the enormity of the place doesn't hit home when looking at a map.