gpsblake

Not a bad idea. The only negative I can think of with a bivy (which I used in the past) is that if bad weather comes along and you are stuck in that bivy all day long on your back. You should probably also carry along a tarp to protect your bike & gear from getting wet.

As far as using a tent big enough to fit your bike in, that's a lot of volume to be carrying around. But of course the advantage is you can keep your bike dry and/or have enough room to sit up.

I've never used one but from what I read, most hammocks owners love their hammocks. But I like to sleep on my belly and a hammock doesn't allow me to do that.

I guess the point is, use a shelter that you are most comfortable using. It's really a matter of personal preference. My preference now is a 2 man tent.