I think you may need to stop between San Jose and Portland. That will be a long trip. We like Seven Feathers RV Resort in Canyonville OR. They have the cheapest fuel in the area at the travel stop there. You can drive to Crater Lake from there. (about an hour to an hour and a half).
For Portland, we stayed at Columbia Riverfront RV Park in Woodland WA. We drove up to Mt St Helens from there. Also drive to Tillamook Cheese and Ice Cream factory in Tillamook WA. Great cafe there for lunch!
To see Banff and Lake Louise, we stayed at Mount Kidd RV Park in Kananaskis, AB. Be sure to make reservations!
For Glacier National Park, we love Glacier Meadow RV Park in Essex, MT. I would take CA 4 south to I-15 then west on US2 to Essex. Short drive to east entrance and about 35 minutes to west entrance. Be sure to visit the Isaak Walton Inn in Essex. We also toured the Hungry Horse Dam while we were in the area.
We stopped half way between Essex and Cody WY at Columbus MT at the Mountain Range RV Park. Nothing fancy, but convenient and reasonable rate. There is a Pilot Flying J Town Pump truck stop on the other side of the freeway.
For Yellowstone, we stayed at Yellowstone Valley Inn and RV Park west of Cody WY, or you can find some parks in Cody but it's a longer drive to Yellowstone.
For Crazy Horse (guess you mean near Mt Rushmore?) Custer's Gulch Campgrond is 8 miles away and gets good results. We stayed at the Mt Rushmore KOA and took their shuttle to Mt Rushmore. After that, can't help much with places to stay. If you have time, drive the Enchanted Loop in NM.
once we got our route established I searched on this forum for more info for each leg to find out about any steep grades.
