In Montana there are no new rules or Invasive Species Stickers required... To see/read Montana boating laws and lake/river restrictions got to http://fwp.mt.gov/recreation/regulations/boating/
In Washington there are no new major boating rules or Invasive Species Stickers required. However there is a new pass with associated fee one must have to access any state owned lands and water access points on those lands (Washington State Parks, Washington State Department of Natural Resources, & Washington Department of Fishing & Wildlife), its called the Discovery Pass. This pass/fee was created because of the States recent budget cuts and so it is hoped that the new fee will replace the lost funding. The pass cost $30.00 (day passes cost $10) and will be required starting July 1. You can buy the pass online or at various businesses... For more info go to http://www.discoverpass.wa.gov/
I hope this info is useful to you. Remember if you need any info about Inland NW marine rules, policies, etc. go to http://www.funtosail.com/guide/guide.htm . It's a great site to get pertinent info and links related to marine policies and access, etc. within the Inland NW.