Good sir and obvious "know it all", that is clearly not a Camel. Since carp are the bottom feeding scum, you can only assume that the fish is enjoying the rich and smooth flavor of a GPC brand smoke.
You mention carp on the Tulpehocken being an issue, why? I began fishing the river when I first started as a C&R project and have continued to fish it but ONLY when the water temps permit fishing. In all of the hours I've logged on that particular water, I can't remember seeing more than a handful of carp, suckers or other "invasive species" that you mentioned. Possibly a fish identification book would assist you. The large fish you are seeing are actually holdover browns. Some reaching the 8-10 range. As they reach maturity, they under go a physiological change. Lake and sea-run trout develop a hump in the back and a pronounced kype. The larger trout on the Tulpehocken experience a similar change. Their mouth moves toward the bottom of their face and becomes very similar to a rubbery vacuum hose. They also develop dime sized scales. This makes it very easy for the novice angler, such as yourself, to confuse these large holdover fish with carp. Hope that helps you out. Tight lines, Frank.