One of the Corps campgrounds we frequent during football season has many trees. I have a King Dome but, out of 41 sites there are 2 that I can use the King Dome.
I don't often use the King Dome unless it's just for a single night stay, when traveling. Then I'm stuck with SD only. I have considered an automatic Slimline 3 but because of the experience I've had with tree interference using the King Dome, I decided a portable Slimline 3 on a tripod was my best choice. But that's just me.
There are not many nice campgrounds here in the deep south that are not tree laden. The ones that are wide open are usually in the direct sunlight and not very comfortable when the daytime temps hit the mid 90's.
I have no argument with the way anyone else wants to spend his or her money. It's just something to consider when opting for the Traveler.