Just ordered a hotshot from T-Mobile for $80, 1st month free and $35 per month for 6 gigs thereafter, no contract and unused data rolls over to the next month. I have heard good and no so good about coverage. Worst case, I can drop the service and only be out $80 which is less than I would have paid to rent an aircard for a week or so.
Falcon Z-917 Hotspot | 4G LTE Mobile Hotspot & Sim Card | T-Mobile