As I completely concur with the postage stamp area to set up in at more times than not, it certainly is a matter of getting prime real estate early, even if (as pointed out in my case the preference to setup my rack next to the driver cabinets).
With that said there is always the option to place the rack next to where the player is standing, in front of but not blocking the cabinet drivers, (I do this so I can easily adjust the Superfilter), especially since we generally, I suppose, for those of us Bassists, are at the edge of the stage. Note: not in the case of a pit type situation such as when Pauldo is performing at some of his gigs.
I suppose it really depends on your band, placement of the player/instrument etc.
The rack next to or offset from the speaker cabinets works out pretty well for me; given that I think we are always trying to improve our setup configurations. A Work in Progress at times and sometimes satisfaction in our setup happens - at least for a while - whew!