If the Tribes offered to change places, let the Recs take half of the Rec share in May-June (when the weather is hit or miss and the kids are in school), then the Tribe takes its entire share during the Summer, then the Recs get to try for the second half of their share during the winter (when the weather sucks and the kids are in school), I wouldn't trade. As long as the assessments are fairly accurate, and co-management is reasonably healthy, the current season system is the most rationale approach.