making waves and putting the boat into water?

Q1:How do i make waves in water, do i do it with a hairdryer whilst it is drying?? i dont want massive waves, its a Tamiya Pibber going down a river at slowish speeds so nothing to major

Q2: And how do i go about putting the boat into the water??? do i put it in whilst its drying or do i make a mould of the hull put that in then take it out when the water is dry so i can just replace it with the boat its self???
Please help
Many thanks Radleigh