I’m not sure about resorts, but check out the vacation rental by owner website (vrbo.com) I have been using this site lately and finding some great deals on rental property that blows away a lot of resorts accommodations and prices.
http://www.wolfriverresorts.com is right in Winneconne, which is one of the upper lakes, and about a 15 minute drive to the launches in Oshkosh, or you can put in right in Winneconne, and drive the boat down. Early season, you’ll want to be in the upper lakes, May through the end of July will be a main lake bite.