Traveling to Jackson Hole is daunting. It is far away, expensive, very very cold in the winter, hot in the summer and muddy the rest of the year. Nonetheless, one visit and you will fall in love with the scenery, wildlife and mountain town vibe.
As a seven year Jackson resident and a sometimes food/travel writer, there is nowhere that I would give a lower rating than Nani's for service and value. A plate of mediocre pasta is $27+ without salad and the bread is cold. I hadn't been there in five years and tonight realized again why. It will only take two times. The food is awful and overpriced by 250% at least. I hadn't been there in 5 years, gave it another try and wished that I'd continued ignoring the oft forgotten (by locals) restaurant. There are other tourist traps in Jackson as well, so seek local knowledge before digging into a big tab.
Eating in Jackson will never be a steal, so at least eat well and with good service. You spent all dy outside burning calories, no replenish. There are some excellent options...Blu, Snake River Grill, Rendezvous Bistro, Rusty Parrot's Restaurant, Osteria and for less expensive options where the locals go...Picas, Dornans or Teton Thai.
It pains me to hear about visitors to Jackson being sucked into one of the many tourist traps in Jackson.