Ken, interesting query, but this has led to problems in the past. The rodent repellent and poisons can mess up the however natural you want to call them life systems around the area of the shelter. I know this is nearly not as bad as rat poison that some hikers tried a while back which ended up killing owls, foxes and other creatures that were not the target, but re-con can still have adverse affects.
Also, it’s not really neccessary. The mouse overpopulation is our fault, we need to live with it and learn to camp in such a way that it does not get worse, and this can be done without having to carry an extra bottle of re-con, just practice smart handling of food. You’ll be fine! Sometimes I think the mice stories get blown outta proportion, sure I have mine, but in retrospect I relish those tales and frankly all my stories have me to blame: I left my food bag open on the ground, smeared chocolate or peanut butter on a sock…
I’m not getting totally hippie on ya. I’ll admit I found and carried a mouse trap for entertainment part of the way on the trail until I got tired of it. Mice are harmless if you take the common-sense precautions. Hanging your food, also, I heard that kevlar bags (3-4 oz.) are rodent proof sacks for food (see more at thru-hiker.com).
Bottom line, I think the re-con is a waste of time and money. Maybe a sock and ear-plug was nibbled by a rodent, but that’s the only gear I lost to the gnawing brats, and those occurences could have easily been prevented BY ME.
Sweeper