I agree that is a long light out of Orange Lakes onto 192, but it's still the only way to go. After getting onto 192 proceed approx 3.7 miles to World Drive, should be well marked.
Another option would be to take a left onto Sherberth Rd, approx 2.2 miles from Orange Lakes. That will bring you into WDW near Animal Kingdom Lodge.
You could also get onto 429 north and then exit at Western Way turn right and it will take you into WDW near CSR, at Buena Vista Dr. That would be the longest in distance (approx 5.5 miles) but you won't have as many lights or traffic, and there is a toll.