Another vote for going with the hotspot feature on your phone, unless you need more than 4 devices at a time running. If you do, go for the
Jetpack AC791L. Has a battery that lasts 24 hours, supports up to 15 simultanious devices, it's unlocked so you can use it with any carrier in the US or internationally (probably wont get LTE though), and it has LTE band 4 (1700mhz) which Verizon is rolling out especially in major metro areas. Since there are few Verizon devices that have band 4 access, you may experience faster speeds than devices that dont have it.