The amount of "trouble" you will have with your rig is directly related to your experience with it.
Your trailer length is short enough that you shouldn't have problems finding a site at any campground. Around 24 feet is the cut off most places seem to use before you have to go into the "big" slots (IE: less of them available).
Getting it into that site is a different story.
I would suggest you load up one weekend and head to a local parking lot that is either a closed store or is relatively empty. Take some pylons/posts/ whatnot with you and set up some obstacles to maneuver around and in to. This is practice that will serve you well when you get that campground with tight turns or close sites.
If this is a new rig (IE: hitch, trailer, etc), it is probably also worth your while to download the hitch setup manual and verify it is all correct (measurements, etc) while sitting on level ground. Parking lots are great for this and dealers are notorious for getting the setup wrong (IE: setting up hitches to what they think is right rather than the manufacturers directions).
My rig is 34 feet bumper to hitch and the truck is right around 20-21 feet (K2500 ECLB) and I have no problem maneuvering it around, but I'm practiced at it. I've seen guys with 21 foot trailers unable to get into spots I can do relatively easily.
Practice, practice, practice. Trust me, it can save your marriage!