Tumalo is a great snowshoe. I start from the Dutchman Flat sno-park. The trek is really a no brainer; head straight up, then turn around and head straight back down. I would guess this is one of the more populated trails off the Cascade Lakes Hwy so there are usually tracks and people to follow. If you did happen to come down off track you would end up on the Hwy and could easily follow the road back to the sno-park.
I was surprised at how few people were out this weekend. I thought with it being spring break and a holiday weekend that there would be mobs of folks out, no such mobs were found:)