Oh in that case you should try to figure something out. There is still the Wrap behavior, which I failed to use properly in a scrolling game. But maybe somebody else has more experience with it.
I have objects in the environment as well, though. This seems really messy... ehhh
What do you mean you have objects in the environment? Are we talking about some sort of seamless scrolling background? Your objects (enemies, powerups) or whatever would be seperate objects so I don't really get what's the problem with that.
You really should try to prototype this. In most cases it can be done in Construct.