If you don't already have a set of handles, they help A LOT!
I'm a short, chubby gal and i have what should serve as excellent steps on the side of mine, but I can't get my leg up there and then push hard enough to get into the jeep. So I just swing my leg into the tub and pull myself up with the handle.
If you go shopping for handles, I have been through three different brands and the Corbeau are the best quality out there. They run about $39 a set, but are worth it.
They have heavier straps, the handle doesn't slip around and nothing stretches out of shape.