My mom is traveling to WDW with me & my daughters next month, and she is still getting her strength back after a knee replacement. She will likely rent an ecv, but also wants to have a cane with her. I suggested that a foldable /collapsible cane might be a good idea, since she can easily carry it in the ECV basket. Does anyone have any suggestions for a particular cane, that is sturdy & safe but not expensive? Thanks!