I'm planning for a weeklong trip to see the in-laws. DH and I will be taking our 3 mo and 2.5 yo. What would you suggest for stroller lineup?

The 3 mo hates his car seat and I usually wear him as a result. The 2.5 yo can walk long distances. We primarily use her stroller for containment on busy streets.

We will be renting a minivan at our destination so the double stroller should fit. We will be checking the infant seat so we won't have to lug it through the airport if we don't take a car seat stroller.

My menagerie of strollers:
Chicco infant seat caddy
Contours double (infant seat attaches)
B-agile & Maclaren (singles for toddler, I don't have a Britax seat for attachment)