Aaron, welcome to the forum. I, too, am a Jeeper and camp when I wheel. I too had a Scamp. It was a 16'er with no bathroom. It weighed in at 2200# ready to go. Fine for my 92 Bronco, but not for the 4cyl/auto TJ. I too went looking for camper options based on weight, overall size, ease of senting up camp, and most of all, storage.
I sold the Scamp and am saving $400 a year for storage. Weight makes for a small camper, either compact or expandable. Pop-ups was a choice, but do to overall width required storage costs. Same for a 13' Scamp and any other small hardside camper. Although, a Compact camper would probably workout. Fleetwood has introduced a pop-up camper for 2 and is rather skinny in width and would probably work, but the cost is rather high for them new. 67" is their width, but in that width, they have some fat wheelwells covering the tires. They could make the camper a little wider, cover up the wheels, and maybe even have a slide-out for a better use of a camper for 2 (just my take on it).
I have a location at my house for storing a camper. It's a city requirement to hide trailers/campers from public view with a fence. My gate is 78" wide open. With weight, I want to be able hand handle the camper in the tight spot. Since I mostly camp/wheel with my son, a minimal 2 sleeper would be necessary. For ease of setting up camp, I want to be able to bring minimal equipment and have a weather proof sleeping area.
Thus choices were limited to a folding tent camper or a tear drop style camper. I went researching and found tear drops to be interesting. Due to time constraints, I went and purchased a commercial td mfrd by Pleasant Valley. Its a basic utility td, 4x8 in size, weighs 660# or so, and fits my needs somewhat for now.
Some suggestions, from camping several times now, a slightly wider width would be better as 4' is a tight space with a kid that likes to roll around. And recently my daughter has been coming so an extra bed space would help as I don't need to sleep in the tent. So I suggest a 5'er. To keep width minimum, tuck tires into/under the td. For length, the 8' is a little shallow as I don't have a full kitchen and do pack for weather. So a little more storage space for those weathering items would be beneficial. Plus, when breaking down camp and some items are dew wet, I'd rather not toss them into my bed area. You'll read more about that on this forum. A full kitchen is not necessary for me, but I would like 12v/120v setup. A lot of my camping is in an equipped campground, but there are times where I'm off the beaten path, so a little ground clearance and offroad handling would be best for me.
I've started collecting for my build. I've got a M101 military trailer frame to start with. It's 54" by 96" for a frame. The military axle, tires, suspension, etc will all be replaced for lighter weight. I prefer a trailer too with a parking brake. Many tds don't have such a brake, but you should look into that. Adjustable stands will help stabilize the camper with not-level camp spot.
My tow vehicle is a 97 TJ, stock 4cyl/auto, with 4.88s and lockers in the D30/8.8. I run 34" LTBs.
Hope this info is helpful.