You will find you don't need it for long, hence using something that can easily be removed. Even very little chicks with mama hens can get lost sometimes.
By 2 weeks I expect my chicks to be able to find their way back to their brooder if given access to the whole chicken enclosure (525 sq ft), so their navigation ability progresses fast.
I usually take mind down in less than a week. Definitely by the time they can fly a little because my barrier is only half-high.