Yes, USH does offer a front of the line pass. I know you can check on the website to find out costs, but you might also be able to update on the day you go if you want to see how busy it is first. We went the Tuesday before Thanksgiving (park open 10am - 6pm), and you could upgrade once you entered the park. To upgrade to a front of the line pass was $35 a person, or $25 if after 2pm. It didn't look like the cost of the ticket you used to enter the park mattered (but I didn't check on this), once you were in that would be the cost to upgrade. I believe that this is not always available though, the only sell a certain number of the passes, so if you go on a busy day this upgrade might not be available.
And the pass was absolutely not necessary the day we went. It may have saved a couple minutes here and there, but the lines were reasonable that day anyway.