I agree with Bob: Iceberg would be the way to go. I considered your same plan about a month ago, but camped at UBSL. The extra gain in the morning plus crummy conditions discouraged me from continuing to Russell after descending the chute on the MR. If I'd had a fresh start from Iceberg that morning, my guess is I'd have bagged Russell as well.
The route you'd want to take is up the MR, back down the chute and traverse North along the slope above Iceberg lake to the notch there on the ridge between Whitney and Russell. Summit Russell by the south face ( couple variations ), then back the way you came to camp at Iceberg.
