Protection from deer?

I have a very open planting space with no fencing, I usually guard my new trees and shrubs with an individual fence to protect them from deer and rabbits. However I have a couple trees I just planted right near my house,  and I temporarily wrapped the trunks in burlap to protect it. My question is, can I leave the burlap all summer or will it cause some kind of damage to the tree/trunk? Should I just replace it a soon as possible? I would like to take my chances with he burlap until winter, then fence it, just because it looks more natural than a fence, but I don't want to kill my beautiful plum and weeping cherry tree in the meantime. I'm in the  northeast US by the way, so our season of winter prepping starts in October/November usually (I just planted the trees in April), and the deer will eat them at all points of the year. Thank you for any help!