Sikkim travel itinerary required

Hi friends,

I'm visiting Sikkim between May 18 & 23. (Starting from Darjeeling on 17th of May).

I'm a solo traveler (as of now). Suggest me the places to visit (a travel itinerary for 5 days would be highly appreciated ).

Also, is it necessary to book the hotels in advance? (I don't want to spend a lot on accommodation).

And finally, if someone is interested to join me, WELCOME !!!

This should get you started.
http://10yearitch.com/destinations-3...egions/sikkim/

No need to book in advance.

Plan - A
Day 1------- Reach Gangtok and Explore M G Marg in the evening
Day 2------- Tsomgo(Changu) Lake, Baba Mandir.
Day 3------- Drive to Lachung and Night Stay
Day 4------- From Lachung to Yumthang and Zero Point and back to Ganktok
Day 5------- Drive to NJP

Plan - B

Day 1------- Reach Gangtok and Explore M G Marg in the evening
Day 2------- Tsomgo(Changu) Lake, Baba Mandir.
Day 3------- Drive To Pelling
Day 4------- Local Sightseeing in Pelling
Day 5------- Drive to NJP

Thanku Rupaksen and "10yearitch" for the reply.
@ 10yearitch: Your site was inspiring....

@venkateswaran, I am glad you found the blog useful.
Your Plan A would have been better if you could add one more night in Northern Sikkim. We had done a 2 D/1 N trip like your itinerary and wished we had opted for the 3D/2N option ... See if you can squeeze in one more day