My setup isnt right in the bush but its right against the bush and I can tell you the bugs are much worse because of that. As long as you have some power tools to clear trees and suc away from your rail you should be okay
I mean it depends on the spot honestly. It's hard to know exactly what you're working with without pictures. If keeping it hidden in the yard is one of the reasons you're throwing it in the bush, maybe paint it to blend in a bit. Some browns and greens so it's not as much an eyesore.
But if the bush is wide enough it's doable. You might want to have just the drop in/run in in the bush and have the rest outside. You could throw the rail back in the bush when you're done. Unless this bush area is super wide. I just wouldn't want to have a bunch really close on both sides to fall into all the time.
"The mountains are calling and I must go."
- John Muir