Which plan requires members to pay an initial fee at the beginning of the season?

The Mill River Plan requires members to pay an initial fee at the beginning of the season, which sets it apart from other plans. This structure typically allows members to enjoy various benefits and privileges throughout the season in exchange for that upfront investment. The initial fee provides access to services or amenities that are not available to non-members and can often lead to savings over time when compared to paying for individual services on a per-use basis.

In contrast, other options may not necessarily require an upfront fee or may operate on different pricing models. The Member's Discount Plan often focuses on providing discounts rather than an initial fee, while Subscription Pricing typically relates to recurring payments rather than a one-time fee. The Season Pass Program might also be similar in concept but not specifically labeled as the Mill River Plan. The uniqueness of the Mill River Plan's upfront fee structure is what makes it the correct answer to the question.