I was looking at it today - we will be stopping at the Grand Canyon as we relocate from Reno, NV to Austin TX in March. so we will be driving.
We will stay in Vegas then depart Vegas and head to Hoover Dam (an hour of driving) then from there the South Rim Grand Canyon Village is 250 miles. We will stay one night in the Village and continue on our journey.
The Grand Canyon Village looks cool, it has free shuttles that stop at several places along the rim and it is home to the visitors center etc.
The cost to get into the park is $25 per passenger vehicle
No way would I get in one of the helo's - not going to happen, those dang things have a habit of crashing.
The SkyWalk on the Hualapi Reservation looks really amazing, it is on the Western Rim(125 miles from Vegas) and there are bus tours out of Vegas - however, from what I have read, while the skywalk is really amazing, you don't see the granduer of the Grand Canyon and how big it really is