Be aware that some of the wide ramps specifically disclaim use for two wheel vehicles.
Even though they have the weight capacity to accommodate a bike and possibly the bike and rider combined, they assume that weight is distributed over four wheels.
I'm thinking it's to maintain the safety factor, but it kept me from going that route when I was buying a ramp.
From what I've observed, the narrow ramp and some arrangements of sturdy steps alongside look the least precarious at the various track days I've attended.
Whenever I have to load into our 3/4 ton van (same height as a stock 4 x 4) I make sure to position van so the driveway/street crown provide me the least angle on the ramp. I'm talking having half the street blocked, but it's just for a minute! My driveway has enough angle to make steps beside the ramp unnecessary. It's really a piece of cake this way and you won't need an unwieldy ramp. I'm not particularly tall or muscular, either.
Also, look up and down your street to see if a neighbor has a steeper driveway that might let you use it on those occasions when you don't have a friend around to help.
Trust me, it's always a bit unnerving the first time but it's really not that difficult.