Which Hotels are connected to the convention center via the walkway?

Nearly all. Hilton and Hyatt REGENCY are closest

Aloft shares the Entertainment District Parking lot which is also connected to the Convention Center walkway

Hilton and Hyatt are the closest.

All but the Crowne Plaza are connected by walkway, either directly or through a connection with the Entertainment District parking lot. For the Crowne Plaza, you must walk across a parking lot to reach the parking lot.

The Hyatt!!!!!