Isn't that the t3i by another name?
I have not done any night shots but would worry about long outdoor use.
But I'm a handy designer so my first thought is to a make shift dew and weather shield plus my favorite secret weapon. It's painter's tape. I have some on hand since I can seal it up without worry about tape residue.
The timer I noted may be just the ticket but you are closer to 1,000 with this setup when done. It's a great camera but after living with this one, I'm going to look again at mirrorless DSLRs.