So, after getting a boarding group for RotR (assuming and hoping we get one), can't we go straight to Smugglers Run? For the standby line?
Maybe sharing my experience from about 10 days ago:
- got to DHS ~ 1:10 before park opening (so was about 6:50 for an 8am opening ... go tthorugh bag check in line, etc.
- gates opened at 7am and we were let into the park and people dispersed to be towards the land of whatever attraction they wanted ... we went with the largest group towards Galaxy's Edge as we wanted to rope drop Smuggler's run
- we were held in a big group at the entrance to Galaxy's Edge (noted we basically got there/stopped moving at 7:13am)
- Waited until park opening at 8am. At that time (or just before) they made an announcement about the Boarding Group process (though most of us were already ready to go prior to the announcement and then started trying to get one)
- They give you a few minutes to execute the process before "rope drop" and then they started walking everyone into Galaxy's Edge and getting people in line for Smugglers Run (where most of us were heading - some to Savi's or other spots)
- Line was huge (can post picture if interested) but it moved and we were off the ride at about 8:50am (so about a 40 minute wait, but much of it was walking to fill the queue, etc.)
If we were there 30 mins earlier would have been closer to the front and probably had like a 15-20min wait instead of 40m
So to your specific question, it isn't really "get a BG and THEN get in the standby line for Smugglers Run" it is more "Get into the masses waiting for standby for all things Galaxy's Edge, including Smuggler's Run and in that line is where you will be when trying to secure a BG"
Hope that helps - it might sound like a lot when written out but everyhting is very well organized - didn't see people pushing or anything like that (actually, generally everyone in very positive/excited spirits)