I'm sorry to hear that you are getting type of reaction in Omaha. I lived there for over 20 years, and apparently you found the scum which is actually pretty hard to find in Omaha. Here's a couple o' tips...on the east side which is actually Council Bluffs IA, they have an RV park at the Bluffs Run Casino (but I think it may have changed names recently), and that's where all the RV'rs park during the College World Series that just got over in Omaha. On the west side (you probably drove right past this, Swink), and this is out of city limits...but it is by the Ashland/Gretna exit, which is the furthermost SW Omaha suburbs. I can't remember the name of it, but it's on the north side of I-80 by the truckstop & weigh station maybe around exit 430?? Granted, it is a few miles out of Omaha, but depending on your work, maybe a lot of it is on the south & west side.
Not to mention that you all probably hit the "campers" that left the city to travel 20 miles for the 4th of July weekend. I feel your pain! If it were me running one of those places, I'd be like the owner of a hooker hotel (or a massage parlor)...who's gonna be here a while & keep bringing others in??