Hi,
This is from allearsnet.com:
You can reach the Trail's End Restaurant by boat from the Magic Kingdom, Wilderness Lodge, or Contemporary Resort. The Disney-MGM Studios and Ticket and Transportation Center (TTC) also provide direct bus service to the Settlement Depot. All other parks and Downtown Disney offer bus service to the Outpost Depot of Fort Wilderness. A parking lot is also located in this area for those of you who choose to drive. From the Outpost, you must catch an Orange, Yellow, or Purple bus to the Settlement. Although the Orange bus offers the most direct route, board whichever bus arrives first. It's a quick ride no matter which bus you take. I know these directions might sound a little convoluted, but it's really a lot simpler than it sounds. And if you're unsure, just ask at the front desk of your resort and they'll be happy to help you out.