It is just too hard to judge this one. I run alot of traps especially on my rat line. In quite a few places there will be 4 or 5 underwater bank holes, and a couple crawl outs in 15 feet of bank. I'll set each hole at the bank with a 110, and depending maybe a couple out further in the run, as well as a couple stoploss #1's in the crawl outs. So in that 15 feet of bank I've got the potential to set say 10 traps. My system is take the cream in two checks, maybe three and pull and move, want them fast. Thing is though that in that same stretch of 15 feet 3 or 4 110's over the holes will catch the same rats, it just takes longer as in days checked (days enjoyed). Same result with less traps just more days checked. With my system I pile them up quick, but you have to be careful. Meaning as soon as the catch drops off MOVE since first I don't want to catch them all, leave some for seed. Second is sure I could leave them for a couple more days but whats the point ? You can't catch whats not there anymore right ? Just getting back into trapping just do what you have time for, relax, and ENJOY ! Mix it up a bit too, a couple rat sets, a couple for coon, some fox sets...it really keeps it intresting. I admit for myself it does get a bit tedious putting 110, after 110 over holes over and over.