I'd save that route for the summer then. The road to the Rim Village is currently closed BTW. There's 138 inches of snow on the rim. Here's a current picture at the jct. with Hwy 62.

There'll be lots of route choices to ride there once the rim is clear. It probably won't be clear until July or mid-June. The Sierra Cascades route is tough, but scenic. I'd skip the Windigo Pass option. Century Drive is gorgeous. Other roads to consider include adding McKenzie Pass and the Aufderheide.There's a neat backcountry route from Cottage Grove to Steamboat that's pretty neat. Come April I'd stick to the coastal routes and the Willamette Valley. There's still 8 feet of snow up on Santiam Pass. There's lots of nice riding options in April, but also a possibility of multiple days of rain. Have fun!

I don't care for taking Hwy 47 to the coast. I've never ridden Hwy 26. Hwy 6 is alright. The Nestucca River byway is neat. Hwy 18 and 22 are alright. Look into Lobster Valley Road and the Smith River Byway from Reedsport to Veneta. How many miles would you like to ride on your April trip?