The easiest one to get to would be the Winter Summerland as it is right there by Blizzard Beach. Just take the BB bus from your resort and walk over. When you want to go back to the resort just walk over the bus stops at BB.
Going to Fantasia gardens entails taking a bus over to DHS, and then walking over to the Swan/Dolphin area, then Cross the bridge toward the Walt Disney World Swan and Dolphin and continue straight ahead to the street. Fantasia is on the left and the tennis courts are on the right. (If the big tent is set up, guests may walk through the tent.)