I bet that is semi-possible. Certain areas would probably be impossible to cross without jets, but you could try.
*I imagine a canyon, where I take a repair pack and toss it over the gap, then pick up an energy pack, run back, ski towards the gap, and disc jump as I go over, look up and abuse the e-pack boost to get over the short gap without every hitting right-click.*
Mmm... that'd be hella hard. :]