I'd gather that a canvas top one might be cooler to camp in if one was not able to park in the shade.
I hunt and camp in places like this many times, and prefer the hardtop, as insecure as that is even, to just having someone cut a tent or soft camper to get at my gear.
Everything I'm not willing to lose to a snatch and grab camp robber goes back in the shell before I head out to hunt. Sometimes I even wrap an aircraft cable around the back hatch handles so they'd have more to screw with instead of just popping a latch. Better than nothing I guess. But thirty miles from the highway, and a 1000 miles from home, I'd prefer not to be having to go get more items to continue my hunt in relative comfort. I could survive with what's in the day pack that always goes with me, but it's kind of nice to have a stove to cook on!
Good luck in your search.