Using Skytools 3, which accurately plots Triton in it's orbit around Neptune, we found had good field stars to help identify the moon's position relative to Neptune. We waited for Neptune to be on the meridian for this exercise (around midnight). We had about 6 people in total having a look...but do not know how many actually knew what to look for.

Using both Dave Brock's 20 inch Dobsonian and my 13 inch Dobsonian, we found the moon easily. Triton was directly visible regularly in the 20 inch and occasionally directly visible in the 13 inch. Averted vision made identification even easier.

At mag 13.5, you would expect Triton to be easy...as the two field stars were mag 13.5 and easily visible. The reason for the difficulty is that Neptune is bright and Triton was only about 8 arc seconds from the limb of Neptune. Given another 5 days and Triton would have been further from Neptune, making identification easier.