Double Tow over Eisenhower Tunnel and Vail pass

Planning a trip that would require a climb and decent over Eisenhower pass and Vail Pass.  I am towing with a 2020 Chevy Duramax 2500.  I have lots of experience double towing currently towing a 32' 5th wheel (10,000lbs) and an 18' boat (2,000lbs).  (I am legal under all Colorado regulations for towing double)  Would love to take the boat with as we are headed to Turquoise lake.  Was wondering if anyone else has done similar.  Would love to hear your experience and or advice.