In reply to mike1979:
Hi Margalef has, from my very limited 3 day stay, quite a lot of sectors along the road, so that makes for easy access to the crags with the pram. The road doesn't have much traffic so should be quite safe for toddlers.
There are other sectors on the other side of the river, which I have only seen from the road which may be a bit more complicated, but overall I think you should definitely find something suitable there.
I know this isn't of much help, but then again, no one has so far wrote about Margalef, so at least that's for start.
You can get in touch with the Raco de la Finestra refuge to ask them more details - I think Jordi speaks English a bit...
Cheers
RS