I have left my Double Bull out for months at a time with no rodent damage of any kind. Make sure you keep you blind staked.
I also like to brush mine in for deer. For turkeys, hogs, etc... They don't seem to care at all.
If you are using an inexpensive blind with the nylon material, the sun will bleach the camo to a pinkish color over time.
I wish you luck come fall