If you're wanting any kind of decent life on those batteries, you'll need to make sure they are well and fully charged. Leaving these on float hoping they'll be charged up for the next beating won't work in your case (or any case IMO). I'd really be inclined to do as smk suggested and get some solar so you're not taking them down to flat dead all the time. Depending on what kind of rig you have, I probably would've gotten a pair of L16's (370-435 amp hours vs 232 amp hours for GC's) instead of the GC's. Get yourself a Black and Decker VEC1093DBD portable charger, you'll need the equalize and recondition functions it offers.
