my temps are usually set at 28 ish, but they do go up and down a fair bit. i dont worry too much, as long as its not miles out.
personally i always hibernate, the 2 years i didnt i had really bad results, this year i did again and did the best i;d done by a long way.
its a personal preference, some dont like to, as above they think its a waste of time etc, for me its a waste not to as most of mine dont breed.
i'm over in the uk tho, so the climate is probably different from where you guys live.