You don't need to be at the park entrance a full hour before opening to get a BG. A bus leaving the resort by 7 would get you there by 7:30, which will be enough time to get thru the gate before opening. If they go back to 7am openings, buses will likely start running by 5:30, as they did before.
The first bus may actually leave a bit before 6:30. You can start waiting at the bus stop at 6:15, or even 6:00 if you're really ambitious and prepared to wait up to 45 minutes. Be aware that not all buses show up on the app or the info screens at the bus stops, and that's especially true for pre-opening buses.
If you want to be at the front of the pack to RD another attraction, Lyft & Uber are your options, but request the ride at least 45 minutes before you want to be at the park.
And finally, it is entirely possible that RotR will be off BG and on regular FP+ by October, so don't stress out over it just yet.