Well - first off, hope you had a good break up in the Lakes and Scotland Ujjwal - there's some rather photogenic bits up there.
Second - and I'm sure you will, in due course, but "get some shots posted" as I've been missing it up there recently.
And third, in answer to your question - I definitely use longer length lenses on landscape shots where appropriate. Sometimes the broad sweep of views you get in the hills is wonderful to look at, but when you come to put a frame around it, there's just not enough going on to make it worthwhile taking the shot.
I started out (as most fillmies did back in the day) with a single fast 50mm lens on the camera - I couldn't even afford a proper camera for the first 4 years and had to use a MLT5

. There were definitely times when I wished for a wider lens, mainly for rock-climbing shots where you had a fixed stance and couldn't walk back or forward to frame things as you'd like. Eventually I destroyed the Practika, and bought a Canon AE-1 (again initially only with 1.4 50mm lens) and when finances allowed (finally working by this time) picked up a 28mm and 75-200 zoom (all of which lenses i've still got and are still in use) I found the wide and the long zoom both to be useful for shots in the hills.
I will confess, I do like the occasional wide angle shot, but they're very much something that are dictated by special locations. I've been as guilty as anyone of taking the wide landscape with the hills in the distance, a nice sunset and a foreground of MAMBA (Miles And Miles of B***** All)

Now I'll only go wide if there's foreground interest to justify it, and it usually dictates me lying on the floor, with the camera on a tripod about a foot above ground... not something I can get away with when I'm out on a days hill walking with my mates. Okay - maybe once a day - if they've got some sandwiches that they can eat while I'm faffing around for half a hour :shrug:
But for general hill walks, i'll probably have the all-round lens on the EOS-3 - 28-105mm zoom (or the kit lens on the digital - 29-88mm equivalent) with me, and I'll use whatever length suits. If I'm on my own, and "on a mission" so to speak, there'll be a couple of (borrowed) old lenses in the bag - 17-35 2.8L, 80-200 2.8L and a 28-80mm f/2.8-4L on the EOS-3... (One day I'll get around to buying the modern equivalents for myself) ... and (shameful admission time) the EOS450D and sigma 10-20 in the bag also. Of course with all that and 3 kilos of redsnapper tripod on my back, in addition to the usual hill walking kit, I'm happier with 6-7 miles than an all dayer!
I certainly use longer lenses such as the 80-200 to isolate certain sections of the landscape, and also use it to trick the perspective and make the distand ranges of hills "stack up" and appear closer.
So - like everyone else I guess - the right lens is the one that makes the picture you like. So what if "the rules" say wide angle for landscapes - Be like Barbossa - Know when to break the rules. Sometimes "codes" are merely guidelines!