You can buy both just as easily in most bike shops but you can buy Schrader in Walmarts etc. You can purchase an adaptor to go on the presta valve stem but that seems like alot of effort. Just carry a Schrader tube.

If there some reason why you don't want to use Schrader since the wheel is built for Schrader?

PS I would buy a mountain bike pump anyway - it's really hard to inflate a MTB tube with a road pump and something not geared towards mountain bikes. I recommend the Topeak MTB Morph Pump.