Hi Dawn. I have an older style (meaning the color of the wall is brown paneling and the upholstery is brown with a tiny bit of orange in it.) pop up camper. The cranking it up and down is kind of a pain but no biggie if you have someone helping you put it on or take it off. I have been horse camping with it for almost 2 yrs. I have a 6' bed in my 3/4 ton pickup and the camper goes to the end of the opened tailgate and it's no problem except for tight turns which I avoid making. One time I did that and the handle on the bumper pull trailer I use made a nice little gouge in the tailgate. Other than that, I've had no problems. I don't know what it's like to pull a GN but that's what my next "camper/trailer" will be. They say those are so dang easier to pull. Pulling my steel 2 horse stock trailer with the camper on top is ok tho as long as you have a 3/4 ton truck. You can definitely feel the weight while pulling.
Putting it on, you MUST have a 2X4 pc. of wood in the truck bed up front so the camper doesn't shift toward the front and pop the welding on the bed. Happened to us since we didn't know better. Putting it in the bed is pretty easy and so is taking it off. We always store it on top of those big grey bricks (with the "legs") because the "legs" are kind of unsteady especially if you store it outside since the ground changes (rain makes it mushy and unsteady.)
My camper sleeps 2 up top (pop ups go up in seconds) and since I don't have a porta potty inside (I keep it in the trailer), my table sleeps one comfortably, even for someone very tall.
It has a fridge but it's only elect. so I'd look for a fridge with propane/elect., a sink with a pump (don't particularly like at all) a propane stove I use all the time and a furnace. If you buy an older model, see if the furnace works (mine doesn't stay lit. I need a new one since everything we've tried doesn't work.) and see if the fridge works. Camper refridgerators are the most expensive things to replace and you need to keep it very level while camping.
The only thing about my particular camper is it has a 3/4 size door so if you are not used to it, you will hit your head. A friend of mine has one that opens to a full size door.
These campers also have a LOT of windows with lots of air movement. A good thing.
