Arkles:
I've heard of trappers using Borax but I have not personally worked with it. Sodium benzoate is best and does not cost much from a trapping supply dealer. However, if money is a problem, one can preserve quite well with plain pickling salt purchased for the grocery store. Unless one is prebaiting where they may not want a salty bait or trapping around livestock or heavily populated deer areas, then salt is just as good as anything. I have no idea what borax might taste like if one was prebaiting or if it would attract livestock and deer to the set. Personally I have not noticed any difference between bait preserved with salt or sodium benzoate. Use 8 ozs of sodium benzoate per gallon of cut bait and let the bait then age in a cool dark place for a while until it quits working completely. Otherwise the bait jars might still explode. If one intends to bottle and use right away, especially in warm weather, they should double the amount of benzoate per gallon. This doubling the amount applies to fish also. Disolving it in water first helps to ensure the preservative penetrates well, complete and quicker. When using pickling salt double the amount one would use of sodium benzoate. Ace