Raspberry Bowl is about 1,000 vertical, total climbing for trip is about 4,000 vertical feet. Avalanche concern is mainly the northerly starting zones to your left as you climb Raspberry Bowl. Most of the low angled bowl is not a concern, though the steeper section near the top could be a problem given touchy conditions. For more vertical of quality powder, you can lap the back side of Marble Peak.
Funny thing about this trip was that once we returned, we got reports of the Marble area being incredibly crowded with backcountry skiers. We were the first car there, nearly the last to leave, and just saw a couple of people on the way up Marble Peak. Goes to show, if you get off the beaten path the backcountry is a big place. And if you want parking, just get up early and get the drive done.