Of course to simplify things. Give it a couple of more weeks and you really don't need much more than a mayfly in yellow and a caddis or stimulator in yellow. Have a half a dozen of each in different sizes. From size 12 down to 18 and you are set for 75% of the time until October. This is for the park. Tailwaters are different. If you don't catch anything on top try some Partridge and yellow wets or some Tellico's and you are set for subsurface for most of the season.
No need to make this more complicated than it is. Of course entomology is fun in itself so it won't hurt to know the hatches.