"presidio40"....I'm guessing you'll be coming down I-5 through Oregon and into California. Just before the California border you'll pass through Grants Pass, Oregon. There is a WELL known shop there called Henderson's Line Up. Make an appointment with them. They will, for a modest fee, check out your entire suspension, weigh your coach and road test it. At the end they'll give you a report of what you may immediately need and what will make your coach handle better if you decide to add items later. They're pretty busy, so I would make an appointment.
They have two spots in front of the store that have power, which would allow you to arrive the night before your appointment. There is also a nice campground in town, even though it's right on I-5, called Jack's Landing that you can spend the night at prior to your appointment.