RV Power Inlet

This might be a stupid question - but I'm currently working on a stealth conversion of a truck, and I'm about to install my 50amp power inlet. My question is, since I'm trying to keep my RV stealth and I'd rather not drill a hole into the side of the metal frame where most RV's house their inlet, do you see any problem with installing the inlet on the underside of the RV? The floor is pretty thick wood, so I'd just drill the proper sized hole right beneath the panel and feed the wires up. The receptacle I'm looking at does have a locking cover so it should be protected while on the road. It locks in as well, however, I'm not sure if the strain on the cord would be heightened if it were under the truck. My other option would be to install it into the back, or the side of the metal lockbox that sits under the truck. I don't really want to do this though, because that box houses my batteries. I have a relatively large battery bank, and from what I understand it is better to keep your electrical equipment separate from your bank in the event of possible explosion or whatever else. I also want to keep the risk of the two systems interacting very low. Thanks in advance for your input!