There are two pieces of "carping gear that you average trout guy simply does not think to carry in most cases. One is a digital scale, which I consider a must. Most fly fisherman are not used to catching 10 plus lb fish, so a scale is a key. You have just landed a monster carp, likely the biggest freshwater fish you have ever caught on a fly...don't you want to know how big it is? Seriously, $15 and you will be within a few ounces.
Two...a net. This post is directly related to an excellent post by Mr. P, one of my best carping buddies. Go here and check it out. He just picked up a Patagonia Stealth Atom sling pack after using mine back in ID. Not to get off track, but I love that pack. The kicker, he was able to rig and use a net on his recent wade trip, something Jim hasn't done much in the past. Personally, I have no idea how he had been doing it. I consider a net a must have item. So much so that I bring my net with me to Lake MI, ID or anywhere else I go. A net shortens the battle (and as Jim says, the "take is the premier moment!") and the net is an absolute savior when it comes to really big (20 plus) fish. I can honestly say that one 30 lber I caught a few years ago could NOT have been beached. The hook fell out like butter the second that fish hit the net.
The trick...how to carry one and be mobile and comfortable. Here is my system...it is set up to hang from my Patagonia pack, but really, I could hang it from a belt loop, wading belt, etc.
The components are simple. I bought an "O" type screw thing (yep, I am quite the handy man!) from the hardware store and screwed it directly into the handle. Then I bought a plastic clip (yet to need replacement by the way) and screwed that into the handle as well since my net folds in half. Next up...a $4 dog leash, all I wanted was the keyeing and clip.