If you have Internet access from your tournament site, the USCF’s new online facility for TDs, the TD/Affilate Support Area, can be used to help you get your event ready for online submission even while your tournament is still under way. After round 1, create upload files for your event and upload them through TD/A. You’ll get back a validation report via e-mail which will show you whether you have any membership issues that could delay when your tournament is ratable. That way you can work on correcting those issues while your players are still present.
(Be sure to delete the partially completed event when you’re done checking for membership issues.)