Currently, both regular and diesel are circa $4.50 per gallon in Los Anchorage depending on station.
In an ordinary time, there's probably a (very unscientific) 20% seasonal increase for the summer season...i.e. maybe expect $5.25 - $5.50? / gallon.
...but that's ordinary and these times are far from ordinary. At my weekend place (where I actually fill up more than anywhere else): Dec. 28, 2020 $2.54, June 15, 2021: $2.99; December 19, 2021: $3.65; last Tuesday $4.29. Nearly 70% increase in about 15 months. I think there'll be more hikes than usual this summer and fewer boat or PA-12 trips.....