Hoppy Botanist - Rhubarb and Crumble Pale Ale. The Hoppy Camper pays tribute to John Hope, the 18th century botanist who introduce rhubarb to Scotland. This pale ale puts a modern twist on traditional rhubarb crumble and custard. First brewed in the heart of Edinburgh’s Royal Botanic Garden. We’ve used fresh rhubarb, crumbly oats and sweet vanilla pods to create botanical beer at its best.