BOW is 49,000
76 winter time pax (full boat) weigh about 15,000
Typical 3000 pounds of bags.

About 67,000 zero fuel weigh (well below the limit)

Still leaves about 18,000 pounds of fuel (holds 20,000) for max 85,000 pounds.

To get to the max landing of 75,000 for the CRJ-900LR, it would have to burn 10,000 pounds of fuel, which takes about 2.5 hours. Trips that land with 3000-ish pounds of fuel are very easy to be under landing weight.

Very flexible plane.

Today, I flew a full boat of pax, relatively light bags, and tankered 13,000 fuel on a very short hour flight, then continued on to the next airport, less than another hour away. Burnt 6500 total, and landed under weight both times.