Free: Contests & Raffles.
Yes, but not after August 31st, I believe is the date. Once any deer season has started there will be no purchasing of a multi season permit.
I had to do this last year. All you have to do is take your archery deer tag Into an authorized license dealer and they will call Olympia and have your deer tag voided which will allow you to purchase the multi season tag. If you don't have it voided, the dealer will not be able to choose the multi-season tag as an option.