Black Pine Springs was open in early April, don't think that it has been closed down.
As to the Deschutes around Sunriver, the west side has been closed to camping for many years. The old dry campsites such as Ryan Ranch Meadow, Slough Camp, and the numerous sites near Benham Falls are all taken over by "you bikers"!!!! Nice day use facilities, parking and way too many trails into the woods that never were there before!!
Sorry for the attitude, but way too much recreation area has been forfeited to the non-motorized crowd. Used to love that area, canoe on the river right from the campsite, now, can't use it.