Thanks for the tips - I'll bring the chains along (I have the room anyways), but I'll also plan an alternate route, just in case. And we have a reciprocal pass for over 200 science museums in North America (which was a steal of a deal at the Ottawa Museum of Nature, for people living more than 200 km away...$35 for an annual family pass). I hadn't gotten around to checking out all the possibilities.
And I'm definitely including Xander (small co-pilot) in the planning, mapping, distances, recording and so on...we homeschool (in a pretty structured way), so this is our curriculum for the next while...Although, never having been to Disneyland, I'm thinking of visiting for a couple of days - he loves museums beyond belief, but this would truly round out the whole memorable road trip with mom deal...Still pondering the very rich number of possibilities! Thanks again for your info!
Cori