Rocky Road is such an easy dessert that even I can make it and best of all I'm yet to find anyone who doesn't like it OR who can only have one piece. So it's always my go to sweet if I'm low on time or Mrs Shack is getting her hair done instead of making a cake.
I have followed recipes previously until I realised you can literally throw anything in with melted chocolate and it will taste good so that's what I do - raid Mrs S's cake cupboard, like what I see and in it goes.
Everything is by eye as well no need to weigh anything out, as long as there is enough melted chocolate to glue it all together then you're good to go. My recommendation though is you have one type of biscuit for crunch, dried fruit and definitely mini marshmallows.