Yes electrics are good, will also save you fuel.
If I leave my 2.5N/A idleing for a period of say, 15minutes, it will get up to just over 1/2 on the temp guage, and if left for long enough head up to 3/4, however after rigging a cab switch into my twin electrics fans, if I am to leave my engine idleing or I am going to be in traffic, I can manualy put them on before the engine even gets to the temp that switches them on (whatever may this be?) and it will never go over 1/4 if these are running, so they do a great job.
If you are towing then the chances are you will be doing a lot more stop starts with a heavier load, making the engine work harder, also not reaching the same speeds the same, so not getting the same volume of air pushing through the rad.
On the topic, if I am going along at 70mph, with the fans on, will it make any difference? my thinking is that surley the air hurtling through the rad at 70mph would outdo any air flow the fans could achive, or am I missing out on a point?