Milky Way from Hawaii

I brought the Vixen Polarie to our recent trip to Hawaii. One night, I found a dark piece of beach (not easy!!!) and took wide field images of the milky way:

It was surprisingly difficult to get this shot. Although, the beach felt very dark, this is a 90 sec exposure:

Stacking 10 of them, lead to this:

I had to do some stretching, curve adjustment, saturation adjustment and finally rotate the stacked image, so that the horizon is straight and copy/paste the horizon from a shorter exposure into it.

... and I need to do a better job focusing my camera ...