i've heard sum people mention something like this but couldnt find anything on it using the search function. i have never used or seen one in person but thought this might interest somebody.
seems like it'd be a little annoying in public areas, and once one piece of it breaks ur FUKD rather just have one that turns into those roller backpacks kids used to have in school and then you kick them so they tip haha
hah that thing's funny. If you can't carry your own pack, go home.
It's ironic that they are up around the southern start of the High Sierras, because that type of pack isn't allowed in that area due to having, yeah, wheels.