The extra weight can be an issue and will feel pretty weird until you get used to it.
Definitely practice with it on your single handed rod in the back yard (or on water) and try a few shots to targets before you go. Best get the bad shots out of the way before you come face to face with that 150lb silver king
I use my Pate Marlin with a 12wt from the kayak. Keeping the false casts to a minimum helps prevent sore muscles and arthritic joints