Jordan M.
Yelp
There is no debating that Jenny Lake is well located for most of the best hikes in Grand Teton and that the campsites at this location are more spacious and private than at the other campgrounds at the park. But, these positives are well outweighed by the check-in process and camphost (at least in August 2019) such that Signal Mountain is a preferable option. Here is how the inept check-in process works. To try and get a site, prepare to line up around 7 or 7:30am depending on the day of the week. At 8am, the camp host will appear. But, she will claim to have no clue how many spots are available even though current occupants have either paid for another night or they haven't and have either flipped their occupancy tag to open or they haven't. The camp host will then SLOWLY work her way through the line of cars, refusing to provide useful information to those trying to figure out if it is worth spending another hour in line. Around 9 o'clock, the camp host will magically know exactly how many spots she had from the get go, incidentally having carried just the right number camp spot tags with her all along. To those out of luck, the camp host will make a series of sem-snide remarks from which one might infer that she took pleasure in watching you needless wait in line for over an hour when she could have just counted the number of free spots in the campground, counted the number of cars in line, and told everyone who couldn't get a spot to turn around at 8am. But, hey, that would take a little brain power and thoughtfulness....
To sum it up, if you want to spend two hours in line to maybe get a spot at the modestly better Jenny Lake Campground, be my guest. Alternatively, in those two hours, you could go up the road a little bit, snag a site at Signal Mountain (potentially with a view of Jackson Lake), pitch your tent, and get to the trailhead. But, if your heart is really set on Jenny Lake, when you get there between 7 and 7:30, do yourself a favor and go walk around the campsite, count the sites with an "open" tag on them, count the number of cars in line, and rely on the camp host for nothing as she is either too lazy, inept, or power hungry to do her job well.