Well, we got the rig back today. And I want to give kudos to Colerain RV in Indianapolis.
As mentioned, the stackable unit they installed fell over causing damage to the closet and the washer and dryer.
Colerain made good on the repairs and they put in a BRAND NEW washer/dryer combo. We (or I should say 'she') went with the combo because the new lack of trust in the stackables when configured sideways in a full width closet.
We got our closet rod space back and now have great access to the water fills, exhaust hose and drain hose. So far, very happy.
I didn't have them redirect the drain to a grey tank, so we still have to live with black tank monitoring, but we are now ready for winter and points south.
Will update in the spring about the vented combo.
PS. Combo is bolted to the floor at each corner. Much improved method over previous!
2017 CC38EL Silverado 3500HD