The problem I have found with trying to straddle deep ruts is:- Quite often the lane is never perfectly level and consequently you end up slipping into the ruts. This usually happens after you have already driven so far straddling said ruts. Thus you drop down into deep ruts and sit wheels spinning on your axles/diffs. Out with the shovel, waffle boards, and high lift jack. It happened to me half way up a lane, and my buddy was too far back to be able to simply tow me back out.
So beware.