either way.. you got to be very fit to do it. either by trekking or vehicle it's very tough. My friend went and ended up with 3 days of headache due to altitude sickness. My tibetan guide while I was in tibet advised me against going as well because he says it's really tough and even he finds it hard to cope..
if u need guide contacts u can let me know
i have a friend who has guide contacts there. Comfortable priced too.
I am also planning a trip up this June but not too sure about it now as i am not able to get a block of at least 11 days free =(
Oh...I made that very mistake of underestimating altitude sickness. Spent the first day in Lhasa running around with a backpack, searching for a hostel. Had a splitting headache that night. It was quite miserable. We even had to resort to buying those canisters of oxygen with the plastic tubes running to the nose to get enough supply of air. It was painfully hilarious!
My 6 day trip to EBC was almost entirely cloudy and grey, with frequent hailstorms along the way. When we finally reached the Everest Base Camp, the entire face of Mt Everest was obscured by thick clouds. I almost wanted to cry.
But after a patient few hours wait, the clouds miraculously parted slightly for a minute to reveal the famous triangular summit of the mountain. You can imagine how many photos I snapped in that one minute!