Adventure of a Lifetime

If it hasn't been done recently, have brake fluid flushed and changed. It collects water and causes brake fade on long grades. If front flexible brake lines have not been replaced in many years, replace them they can rupture inside causing sudden pull to right or left. Get to know your house battery charger/converter and house battery setup. Have a multi-meter and check voltage plugged into "shore" power or RV generator running, and with engine running. Check and replenish battery electrolyte levels with distilled water as needed. With good brakes, good tires ( no side-wall cracks) good cooling system and furnace and fridge that work properly, you should be safe and comfortable.
Keep speed under control on twisty mountain roads, downshifting when needed to save brakes, etc.