I think you will do OK with a 5wt if the carp aint too big...I have never done it for golden carp but I use a 5 or 6 on grass carp and also tarpon so I think you will be good...I would suggest that your backing be ready to go and dont panic when it starts melting away which is easy to do...not even a bonefish can go more than 150yds before exhaustion...good luck!!!..be sure to post your pictures please!!!