We want to take a week-long family vacation in July and aren't quite sure where to go. Somewhere in the US or Canada that is not too hot or muggy, that ideally has direct and generally open flights (we fly standby) from O'Hare or Milwaukee, and that would be easy and fun to navigate with a 3 year old and 7 month old in tow. We like to be outdoors and enjoy historical/cultural sites. We will definitely be renting a car and plan to drive around a lot. Any suggestions on where to go? We're open to anything.