Look at Temple Fork Outfitters or Redington rods. Both are good quality and inexpensive as flyrods go. As far as your choice of weight goes, a 9 or 10 wt is fine for kings and any other salmon you will encounter. Just keep in mind to gage your rod size by the water your fishing as well. Big water, big rod. A king in a big river can remove all your backing. The possibilty of three out of the five species are in the rivers in July. You will be too early for silvers and the pinks ran last year. Enjoy your trip, AK is a great place.

Fish while you can,
FFMachine