I would actually recommend discharging the RX and TX batteries after your weekend runs - although it isn't as important as in electric touring cars.
For my EVO III I have GP3300 battery packs - when I discharge them with an NiMH discharger, I can squeeze 4 Amps into them, when I don't discharge them and then recharge, then I only get 2.9 Amps - also the overall power output is lower and the car isn't so responsive.

Obviously the case is different for the AAA packs in the 710 - you wouldn't notice any difference in response if the batteries weren't discharged and maybe the run time is not hugely different, but good battery maintenance does help to allow the pack to "live" longer.
A couple of things to observe with NiMH is never leave them for long periods with a full charge and never discharge them completely (i.e. to zero volts; NiMH discharges cut-off at about 0.9 V) - apart from that you can pretty much do what you want.

Cheers, Mark.