Is this river walk wheelchair accessible ?

Yes. There is access through a hotel that unfortunately I don’t remember the name.

Yes

There is certain points of entry for wheel chairs but I would highly recommend to go when it's early or later because during peak hours it would be difficult to move around due to narrow pathways in certain areas

Yes. Do use riverside shopping mall for entry

There is access but can get very tight

Through a elevator at a hotel like the Hilton or the River Center Mall

Yes it does but only through certain places.