I just drove past Robb driving on highway 16 coming back from marmot basin, and the ditches looked ok. I never got out so I can't say how great they are.
Robb was okay . The trail from Robb to Edson has minimal snow but is in relatively good condition ( use scratchers ). South west of Robb towards Lovett staging area is good but also needs fresh snow. The powerline is beat and well travelled but it is better than nothing. The further west the deeper it gets.