Best camper i've ever had was Lolly. I really liked her at the time, so I was beyond happy to receive her in the camp site. She's the only camper I remember being happy about apart from Chrissy, most of my campers were just meh.
Of course, I gotta say Snake. He's my dreamie, after all. I didn't used a camper reset trick at the time I got him, and when I saw him inside an igloo I literally jumped out of my bed and yelled "OH MY GOD. SNAKE." for 5 minutes. He played rock-paper-scissors with me twice to win him over.
I'm not really sure! I think I got Melba at some point in my camping journeys, but I really can't remember much about all of the other campers. I for sure know I got Chow recently. Is it just me, or before you enter the tent, you get all nervous?
Ahh man this is really hard to answer, guess I've forgotten most of them x.x I guess Octavian was the best but I was full ;_; but the best which I invited was Roscoe, as I was looking for him and there he turned up in camp (we'll ignore the fact he sneakily moved out when I didn't play for a few days and was too lazy to check if anyone had moved before booting up as mayor).
The only one I can remember off the top of my head was Lobo, who visited while my town was full. My campsite usually gets villagers I would NEVER EVER want in my town, like Pietro or Canberra. Just eww.