The area from Homer to Cooper Landing in mid July is all about two different salmon in the Kenai and area streams. King salmon and Red Salmon.
As to Kings, this is a world class fishery in the Kenai. However a boat is needed and a guide recommended most certainly if looking to hook one on a fly.
For Reds, find a decent bank between the town of Kenai and Cooper Landing and start drifting a fly close to the bank for Reds. You can find the leader, weight and fly setup at any of the area shops. This is meat fishing and not the finesse fly fishing that you may think about.
If you venture to lakes and small streams, you will likely find some Grayling and small rainbows to come to the surface for a fly.
I would leave the two handed rod at home unless you just want casting practice. Later in the year, I love a two handed rod for swinging leeches and flesh in the Kenai. But in July there is little application.
For the reds you will want an 8-9 wt rod. For the Kenai king, you will want a 10-12 wt rod with a heavy sink tip.
I hope this helps.