LT
 December  bad choice it's winter season and view will not be that clear as fall  even though,here are some info  You better go Ghorepani,tadapani , and ghandruk these are the Moderate trek  it start and end  in pokhara.. You can do it by yourself hope you' are nepali  .There are lot of trekking inns and tea house on the way  to get the direction  .So there is no need of guide,but you may need a porter cause  These treks  are 5-6hr a days and if can carry  your own back pack then its all right  or just  hire one porter in Pokhara .