Question about TT suspension

It's a little hard to describe, but my neighborhood doesn't have sidewalks. The driveway runs all the way to the street, but someone decided to make the driveway flatten out where there would've normally been a sidewalk, then the driveway slopes upwards again until the garage floor level. So I have the crown of the road dipping down where the drive meets the street, it slopes up for a few feet like a normal driveway, then flattens out for about 3 feet, then slopes back up. When it slopes back up it's a big hump, not a steady flat slope. When the rear axle hits the humped part it lifts the trailer enough that the front tires come off the ground for a short period.
I will look into the axle ratings, does anyone have any suggestions as to where I can find that info?
Again, thanks for the replies.