Experience with rollators in the parks?

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Does anyone have any experience or tips using a rollator in the parks? I thought the rollator could help my balance, give me something to lean on, and provide a seat, now that the benches are fewer and farther between.

I can't use an ECV due to poor and no side vision, picture a horse with blinders on. My dh can't push me around in a wheelchair, due to his own (invisible) disabilities.

Thoughts anyone? I used to get a GAC for vision problems and no stairs, but I've been too intimidated to ask lately :X Now since we are frequent visitors I've been muddling around as best I can and then we go home.