I'm so sorry to hear about your accident during such a transitional and inconvenient time! I would contact your insurance company in Oregon and talk to the claims department to see if this will be covered. Many companies provide a grace period for you to obtain other insurance while you are moving to another state.
I'm sorry to hear about how you're being overcharged for your insurance! It is true that having an SR-22 will significantly impact your premium, but it sounds like you might be having issues getting a hold of your agent, as well. Feel free to shop around, if you'd like to look at other options.
I'm so sorry to hear about your accident! The best thing to do would be to contact your RV insurance claims department to see how they want to handle the claim. How this claim pays out will be dependent on the details of the accident.
Because your mother has an umbrella policy through AAA, she is likely required to have you rated as a driver on her policy. This is a common requirement with insurance carriers who offer umbrella insurance.
We are sorry to hear that you were involved in an accident and to hear about your current predicament. Does the primary policy holder have the written policy so that you can see what cars are covered on it and for which coverage?