day trip to Ayr seaside.... tartan shawl (yep tartan) bucket spade optional
pieces with cheese /cooked ham (salad if yer lucky )and plenty of pop.... some packets of crisps and then a few goes on the local amusements that exist and wee walk then home time everything usually in a backpack or food coolerbag (department store bags aswell ;/)
about as romantic as it gets on central scottish picnics most of the time its"quick back to the car its pissing down "

or a wee picnic at the local lochs /country park

it may be more romantic up the highlands i guess