we can go this year
but my first time at burghley was the year i moved to england at 3 so i was in a big buggy(because i wouldnt walk all day, lazy) but my mum got round fine with me.
To be honest with you though we dont live far from burghley and there has been SO much rain i doubt you will this year. X
It was diabolical yesterday and everyone I saw with a pushchair was having a lot of trouble pushing through all the mud plus all the children were bawling their heads off because they couldn't get out.
For the sake of your sanity, I'd leave children and dogs at home, honestly; unfair on them and you.