For reasons I can't quite figure out now, I decided to fly to see family in Ireland next week with DS (3yo) and DD (4 mo) ON MY OWN 
I need to work out which method of carrying/travelling I take with me from this extensive list! ANy thoughts?
Bugaboo Chameleon carrycot
And base
Baby car seat (needed, but fits on the bugaboo base)
Maclaren
Babybjorn sling (haven't used it since she was tiny, is now a strapping 16lb-er)
Trunki suitcase for DS to sit on
Is 4 months too small for a buggy? Mum has a car seat for DS but no other carrying about equipment. Most worried about DS running off in the airport, and carrying DD from plane to baggage.
DH joining us after a few days so will be fine coming back, but god I am dreading the journey over