Yeah lots of ways of doing this. You could fit a LEO-to-moon transport vehicle, as described by Robert Zubrin, on a Falcon Heavy. Basically you use Falcon9 to

Yeah lots of ways of doing this. You could fit a LEO-to-moon transport vehicle, as described by Robert Zubrin, on a Falcon Heavy. Basically you use Falcon9 to get in and out of LEO using Dragon. A Falcon Heavy can push a larger space craft into LEO and it saves weight by the fact that a LEO-to-moon vehicle doesn't need heath shield and other stuff which makes a Dragon capsule heavier. And with Falcons being cheap you could even send a whole bunch of LEO-to-moon vehicles straight to the moon surface, as well as just dump fuel tanks there. SpaceX has a lot of these and can build them quite cheaply, so the mission will have a lot more built in safety. E.g. if you got an extra lunar ascent vehicle sitting on the landing site already before astronauts arrive, you have extra redundancy.