When are you going? It makes a difference because of the passes that are closed. If it is in the summer, and you go over 20, I would stop in Winthrop or Twisp. Pearrygin Lake State Park is near Twisp. Leavenworth and Chelan area also great stops. I also really like Bridgeport State Park on the Columbia near Brewster WA. You can filter to find parks with the camping facilities you need and see places to stop at https://maps.northwestportal.com/outdoors

If you’re heading over this time of year, weather and what your vehicle can handle are going to be your primary concerns.

I'm assuming you mean the National parks. If so the direct route goes right past Grand Coulee Dam, the largest Dam in North America.

A little out of the way would be driving down to Wenatchee. It is a nice small town situated on the Columbia River and would definitely have what you are looking for in terms of services and a bakery.

I hope you have a snow plow, HWY is covered all the way over and the other passes, are experiencing heavy snow ATM.

HWY 20 they will close very very soon, so I wouldn't plan on that as route of travel.

Planning this for next summer

Planning this for next summer

If you are going in the summer, take 20 thru the park and down into Mazama. Stop at the Mazama store and get the sea salt baguette…you won’t regret it. They also do coffee drinks and good iced chai. Continue on to Winthrop, have lunch/ dinner at the School House Brewery in Winthrop or the Highway 20 Pizza. Next town in Twisp, the Twisp Pub has a really good selection of beer form all over the area. Winthrop has the most places to sleep from a hostel to camping, Pine Near in Winthrop has teepees and Pearrygin Lake has rvs , but you need reservations for that. The swimming in Pearrygin Lake is really good too. There a really good coffee place in Twisp, the Blue Star…it’s just outside Twisp. Also, take my word for it, stop in Hank’s Grocery store in Twisp… it’s an experience…look up as you shop the aisles. Hanks has the best prices for food and gas of all the towns, so wait till you get there for gas, especially. You can take the back roads and see the Grand Coulee Dam. Taking that route will get you to Spokane. After Spokane is Cour d’Alene, big, big lake, kinda touristy but that lake is impressive. Get ready for crossing the Idaho panhandle. It’s a lot uphill and twisty/windy. Just as you come to the MT boarder is the 100,000 Silver Dollar Saloon. Go inside and see the silver dollars but don’t eat the food…truly horrible. You can go either the back roads way to Flathead Lake, there is a hot springs that way or you can take the highway to Missoula and go north from there to Flathead and Glacier. I prefer the back roads to Flathead. Have a great time…it’s a special part of the world.

I have done a number of these and can confirm they are great

Tonasket natural food cooperative and deli. Breadline Cafe in Omak. Republic WA downtown. Great brwe pub in Oroville. Eastern Okanogan County = little Seattle. Touristy and packed in summer. Okanogan valley and east over Sherman pass much more of a frontier feel. If you have the time... Get into BC at Oroville on 97. You'll go from sleepy towns to big city with great ethnic diverse eateries. Don't even get me started on the fake Bavarian town of Leavenworth.

Take US 2 not I 90. Waterville, Coulee City, Davenport, Libby, Kalispell.

I forgot to add the bakeries! Winthrop has the Rocking Horse Bakery on the Main Street, down by the outdoor store which is awesome. Twisp has the Cinnamon Twist Bakery on Glover Street next to the natural foods store, Glover Street Market. But the true best treat is the sea salt baguette at the Mazama store. Their sandwiches are very good too.

Stargaze in Winthrop! They have a dark sky rule, so no light pollution. It’s amazing.

Breadline cafe is sooo good