Without a doubt availability of Internet or WiFi has become a real necessity in terms of genuine facilities anywhere in the world. Nepal does have a lot of Internet connections spread all over its touristic centres like Kathmandu and Pokhara so you shall easily get an access to the Internet while staying in Nepal. You can do almost anything you need to on the internet as Nepal has many trekking routes with continued internet connections outside Kathmandu and Pokhara also. These days even in the Everest Base Camp, there is wifi so you might use it when you are there. But may not be always working since in the high Himalayas the connection gets sometimes to slow or even not connected.