The hay bales aren't for bait, they are for BUILDING a funnel.
I think they would work great for the distance you are talking about - if 45 feet makes that big of a difference, then see if he can stack them in a row, and leave the fence opening you mentioned on your end of the row of hay. They are wide enough that I don't see a deer ever attempting to jump over them. Please let us know if you find this to be false, because that would be a pretty interesting sight
Follow DA's advice and cut a trail from there so that it becomes a highway for them - between the hay bales, the fence, and the clear path on the other side, you will be inviting some pretty good activity, I think. I would advise you to put out a small no-till food plot in the area, but you probably couldn't make it big enough to keep from being eaten to the dirt...others may disagree here.
I've seen others do these sort of alterations to make funnels, and they are often quite effective. I've done much smaller scale versions that involve hinge-cutting small trees of low value (think sweetgum and birch) to make a poor man's "wall" to point deer towards a better angle for a trail camera.
Normally I wouldn't put forth as much effort for a single spot, but in your case, it might turn it into a honey-hole.