Can you plan Crater Lake for your return trip later on? It 'might' be possible to park the RV elsewhere - Collier State Park or Joseph Stewart State Rec Area - both very nice, and just drive your vehicle to Crater. Early in the season they try to have the road plowed just to the lake but not around it. It's a gorgeous view with the blue lake and snow on a sunny day if you can do it.
Keep checking on this park site for updates. If they don't have another huge storm it looks like it is plowed to the Village right now so you could get to the lake itself. They always make an effort to keep that portion open. Go for it but don't plan on camping in the park. Any of the two above that I recommended is in better climate for the RV.
https://www.nps.gov/crla/planyourvisit/conditions.htm
Full-Timed for 16 Years
.... Back in S&B Again
Traveled 8 yr in a 40' 2004 Newmar Dutch Star Motorhome
& 8 yr in a 33' Travel Supreme 5th Wheel