Some thoughts - riding from Bachelor to LA will mean riding through some heavily populated areas and while a route can be devised through those populated areas that will be 'safe' (and that is never a given), there is much to be considered. Also, any route from Bachelor to LA will require crossing some mountains. If you travel from Bachelor to the coast to join the Pacific Coast Route, there will be climbing over the Cascades plus climbing the Coast Range, then there will be climbing along the coast. Plus, once in California on the coast route the route is, in my opinion, less rider friendly than Oregon, particularly if this is your first cycling tour and riding with teenagers and young children. If you travel south from Bachelor using 97, which is generally a good cycling route with, for the most part, good shoulders, then you will have a decision to make when you reach K. Falls. Either continuing generally south on 97 to California, or taking 39/139 from K Falls to eventually connect with 299 to Redding, then south through the valley until, at some point, you will need to decide how you want to navigate the population centers in Northern California (Sacramento, the Bay Area). There are so many issues to consider, which is likely why you are not seeing many responses to your request. There is no easy answer. If you live in Central Oregon, since you mentioned Bachelor, I would be willing to help you explore possible routes. Let me know.