I have done 2 solo attempts, I prefer the double style. It is especially helpful when the wind picks up and you need to get somewhere.  I always take a back-up paddle and I have a telescoping one from Walmart, works great for fishing and maybe in a small creek.  But I also have seen many people with 2 paddles, one straight and one bent...I think it is what you are comfortable with.  
I do know that attempting a tricky crossing using something you are not comfortable with could lead to problems.
I would borrow or rent one your first time, I think most of the doubles come apart and are pretty easy to store.  Just have some bungee straps around and you will be set.