Question for Four Wheel Camper owners and others w/no jacks

Not to beat a dead horse here, but if you look at my profile you'll see I have a NS Laredo. I said I'd LIKE to be able to go 80, actually I lumber down I80 at between 60 and 65. Takes all day to drive across NE, slowly and surely enjoying the fields of corn and beans and corn and beans. What's really scary is looking in my rear view mirror through the camper and out the little back window and all I can see is the front grill of some semi bearing down on me.