There is a difference in having two coax feeds and having two LNBFs which no dome has.m looking at the winegard rt 4035 it says it can handle 2 recievers or 1 dual.
The Winegard RT-4035 has a primary and a secondary output it says in the instructions
Connect a coax cable from the “Satellite in” port of the primary receiver to
the main port on the back of the RoadTrip Mission unit. For a two receiver
or dual tuner (DVR) installation, connect a second coax cable (not provided)
to the secondary port on the back of the RoadTrip Mission unit. Note: the
secondary receiver will not toggle.
Not sure what the statement receiver will not toggle means.
Yes you are dreaming.
Notice that the Trav'ler series uses a conventional HD dish. You would have to fit that whole antenna assembly (including the LNB and arm) under the dome and figure out some way to keep it level so the skew didn't get messed up with curve banking and road crown.Anyhow, the Trav'ler is what I was remembering. One wonders why a dome isn't available for this dish.