I had my wife and daughter out with me for a 3 hour ride on Monday (was a holiday here in Austria). The first hour was against a strong headwing and the last hour was uphill the entire way. We will do the same ride today (plus a few more miles) as we get into RAGBRAI mode. The son is at basketball camp this week, so he is missing out on getting in bike shape.
I will look for some lighter weight sleeping bags. If it is too hot, we can simply sleep on top of the bags. That's why I would prefer a rectangular shaped bag and hope to find something that will satisfy us. I am toying with getting the junior sized bags for the kids, but at the rate they are growing I figure why not by the adult size and have it for future years use.
BB