With the new low floor buses you can drive straight no need to back on. . Yes the ques at the parks are main stream mk Que after the first turn you will s ee a gate leading to another little que use that. At the other parks just use the main que unless you see a separate one. Most drivers will tell you not to go through the que and just line up where the back door of the bus will be so they can load you first. At the resorts that don't have a que just wait and when you see the bus you need go towards the back door you could wave at the driver as they pull in yo let them know you want to board their bus. they will let other guest exit and the. Load you. their is a policy that will only let 6 people through the back door one in
ecv and five others. If she could walk a little then she could hoard the bus through the back door and you could drive it on for her. If you need help parking and loading and unloading the
ecvs most drivers will help out. but if some don't it because Disney tells then not to touch the ecv but as I said most will help you out.
If the bus is full or they have no tie downs left they will call for another bus so you won't have to wait for the next bus.