Wide angled lens for mountains?

Using a WA will result in a very different picture as a stich from multiple pictures unless the distortion chosen for stiching and camera movement exactly match the WA perspective.

I'm in the mountains most of my weekends and have learned the hard way that it is really difficult to translate the experience from a huge landscape into a small frame..

The first and often wrong way to do it is to try to put the whole landscape into a picture, hence panoramas and wide angles.

Most of the time, you end up with a lot of grass/foreground, with tiny snowy peaks on the monitor : that is NOT what you probably want.

In that respect, panoramas will be better than a wide angle : the perspective will bring the mountain closer.

Warning for panoramas : vignetting/polarizers, distortion and uncontrolled camera movements are not your friends : they can really ruin your shots, with curved horizons, forced crops and unrealistic skies that have darker areas in the middle.

Out of the subject, but light is crucial as usual and bright midday light (when you reach the summit for example) is very hard to work with.

So my advice : enjoy your trip and the scenery while you are there, because shooting it won't bring it with you. Think about composition first and look at mountain pictures to see what you like in them. Pack small and light to cover more ground. If you are not used to UWA, don't buy one. Don't overuse WA.