Rebs slept in tents more often than not, and those tents were 20'x12'9" open ended Fly Tents.  Oddball flies aren't going to cut it at Rosecrans' Pursuit, so if you want some shelter, get your mess together and finish a Fly Tent kit.  Price includes shipping.  Make sure to include your address with payment.

https://www.libertyrifles.org/research/uniforms-equipment/confederate-tents

Fly Tent Kit

$195.00Price