The fridge in the pup should be fine. Contrary to common belief, bears get into many ice chests not because of smell but because they recognize that ice chests tend to hold good things to eat (think Yogi Bear and the "I see a pic-a-nic basket"). The fridge is not commonly recognized by bears at this point.
You should be fine with the porta-potty, but it wouldn't hurt to just call up the ranger station and ask them to verify. They may have some practical suggestions for you as to placement, etc.
When storing food in the TV, make sure everything is covered. Again, bears can easily identify an ice chest as "potential food source" and will go for it even if they can't smell anything. In some areas, the bears now recognize cars as a potential food source - so watch the notices at the campground and follow the guidelines.
Other than that, don't worry. Just keep your site cleaned up. Dump your garbage every evening before going to bed. Once at a campground where I was staying, a kid had left her empty juicebox on the picnic table. That was enough to bring the bear in for a good inspection of the campsite.
If a bear does enter your campsite, making loud noises (banging pots and pans) is usually all it takes to get it to leave if you've done everything right (not leaving food, etc., out).
Oh, and lock the doors to your TV. A friend has a cabin in a bear area. One evening, she heard some noise outside and found that a bear had climbed into her (empty) car to check it out. The door was unlocked. As the bear moved around inside, the movement caused the door to shut, locking the bear into the car. When the rangers came out, there was a lot of "no you do it!" discussion while they watched the bear tear up the car - no one really wanted to be the person to open the car door. Fortunately, the bear finally got the door opened himself and left in a bad mood. The car was totaled. Had she locked the door, the bear wouldn't have gone into the car in the first place.
1975 American Clipper RV with Dodge 360 (photo in profile)
1998 American Clipper Fold n Roll Folding Trailer
Both born in Morgan Hill, CA to Irv Perch (Daddy of the Aristocrat trailers)