It all depends on your situation really. Yes the single axel is plenty for that boat. With that said if you spend most of your time traveling, 1 hour or more each way or longer you may consider a tandem. If possible and money allows I would go for the tandem. The boat pulls a little better and it also saves on the truck for weight. The only downfall on the tandem is that it is harder to move around in the garage or trying to hook it up to the truck.
I pulled an 1880 around for a year and a half on a single axel and never had one issue at all.
So in short, yes the single is enough, but if you can afford it go with the tandem.
Any questions feel free to hollar, and I will do my best to help!!!
P.S. It is a great boat too!!!