Travelling from Cheshire to Cornwall with dd 10 and ds 8 and would like to stop off overnight on route as doing all the driving myself. Any suggestions south of Bristol (anywhere between Bristol and Exeter) so we haven't got so far the second day and not so far from M5 as enough travelling to do as it is. Would like to arrive lunch-early afternoon so can do something with the children in the afternoon. Places to stay, things to do would be welcome. Thanks.