My daughter will be 2 years and 4 months when baby arrives and we've opted to get a double buggy. As above, I can see myself with baby in the carrier (we have a Caboo and an Ergo) and toddler in the buggy on a lot of occasions, but I also want to be prepared for instances such as going out for coffee with friends (wouldn't feel comfortable drinking coffee with baby in carrier) or long days out when they will both need somewhere to nap.
I don't think I could deal with a buggy board, I'm quite tall and occasionally clip the chassis with my toes when walking as it is, never mind with a buggy board on! I think I would have to stoop and walk really awkwardly not to kick the board which can't be good for your back, especially as I walk around 3 miles minimum per day.
Have you seen the Joovy Caboose tandem pushchair? I was quite tempted by that as it is far more toddler friendly than some of the other doubles. Has baby seat as normal at the front, and then a little seat or stand platform at the back for toddler.
https://www.google.co.uk/search?q=j...AsOv7AbNkIAY&ved=0CAYQ_AUoAQ&biw=1366&bih=633