I’m going to the conference this year, traveling with my caregivers via car as I am unable to fly. I’m concerned about traveling with oxygen. I’m currently using e-tanks at home when I have to go out to shop and Dr appointments. I need a portable oxygen concentrator for the trip. I am unable to get what I need from my current oxygen supply company. I’m on 5 liters of oxygen and can use an optmizer to reduce that continuous flow down to 3. Any suggestions as to what I need from Dr’s to get one? Also where to get one? I’m frustrated that my local company is unable to help in this situation and not going to conference is not an option. Thank you for you suggestions.