Disneyland Questions

[only hope]

Localish WDW passholder going to DLR for the second time. The first time was long before Covid disabled me. I have done some research and know that at Disneyland many of the queues are not wheelchair accessible and all of them at California Adventure are, with return times being issued if you can’t physically access the queue. I may try taking my rollator one day depending on how I’m feeling. Can rollators go through the non-accessible lines? I don’t really want to skip all the queues that have something to see. If rollators are not allowed through the non-accessible queues can I leave it with CM at the exit and walk through the queue? Or my wheelchair if that’s what I’m using?

Also, I don’t remember…how hilly is DLR? Hills are hard for me. For reference, just walking the bridge to get to the gate at Universal or Islands of Adventure I have to slow down and walk at a snails pace.