The only thing you have to be careful with is venting. If your tank(s) rely on the overflow tubes to allow air into the the tank to replace the used water, you will need to accommodate that by opening them after you use a bit of water. On my system, there is a separate vent line that runs up to the fill port, so I could just leave them connected. I do separate them back to normal though, so I don't forget and accidentally overfill the tanks the next trip.
2013 F-150 EcoBoost MaxTow
2013 Jay Flight 28BHS Elite
"My wheel lugs require more torque than your Honda makes!"