I was thinking about getting a small electric helicopter that I can fit in one of those small Jansport backpacks. I want to get something small enough to fly indoors but large enough to resist the wind. Any suggestions?

no such thing really, if it's small enough to fly inside it won't handle much wind.

My 450 is portable and handles some wind. However, I would not fly it inside a house. I throw everything in its case and take it to work or to the park without any problems.

I was thinking of getting a trex 450sa and stuffing it in a basic jansport backpack. I could put my tools and extra battery packs in the front pocket.

Gaui 200 or soon to be released Trex 250?

I like the Gaui 200. If I could I would get one and take it to school. There's going to be a Trex 250? [&:] I didn't know that. With the release of the 700, I thought the Trex line was only going to get bigger! lol

You want to protect the heli, sticking a heli into your backpack is not a good idea imo. you're going to bend something.

I know,I figured I would just put some memory foam in the pack but I think an aluminum case is better. Though, I can't put a case on my back, I'd have to carry it in my hand.