Am I using the wrong size board?

Forecast for today is 5-8 feet. I'm going to head out in an hour or two, I only surf longboard but when conditions are like this. I'm one of the few in a longboard. Needless to say it's very hard to catch the wave as it's too big and I usually sit at the shoulder because I don't want to sit at the peak and wipeout and potentially injury a shortboarder.
My longboard is 9'0 and my funboard is 7'6. In conditions like this, should I be using a funboard? Bear in mind that I just do a crappy turtle roll. So I usually check if someone is behind me, if no one is there. I just dive under without the board and pray the leash will stay intact.
The dilemma is that I'm not confident in a funboard and I feel like a longboard is not the right board to bring since I'm usually one of the few that rides it when it gets to this size..
Here's the current surf condition of my local breaks.
My longboard is 9'0 and my funboard is 7'6. In conditions like this, should I be using a funboard? Bear in mind that I just do a crappy turtle roll. So I usually check if someone is behind me, if no one is there. I just dive under without the board and pray the leash will stay intact.
The dilemma is that I'm not confident in a funboard and I feel like a longboard is not the right board to bring since I'm usually one of the few that rides it when it gets to this size..
Here's the current surf condition of my local breaks.