Personally, if I had a 30 amp camper I would get a 30 amp surge protector. So far while camping, I have never seen a 50 amp pedestal that didn?t also have a 30 amp receptacle in it.....but maybe there are a few. I have seen plenty with just a 30 amp receptacle. A portable plug and adapter never makes as good of contact as a hard-wired situation and adding a bunch of adapters is a potential problem at each connection point where they plug together due to oxidation, corrosion, or water intrusion, which John from Detroit was alluding to. Ideally, the surge protector should be plugged into the pedestal, then every thing downstream of it is protected from potential screwups. Adding adaptors in front of it defeats a potion of the protection most of these units provide. (Open grounds, open neutrals, etc) I have been forced to use a 30 to 50 amp dog bone adapter at a 30 amp only pedestal, but I never like it.