Yes of course you can.  Some runners like to have their own special sports drinks and energy gels or bars during events and these can be left at the aid station.  We recommend you place them in a container clearly labelled with your name and we are not able to take responsibility for left items.One lap will get you the medal.  We cater for all speeds, and for all distances.  So whether you want to push yourself to your first 10km, or to your 100th marathon, all your needs will be looked after.