Here is what I found on NDOW's website about Mason Valley:
1. During the waterfowl season, hunting is permitted only on Saturdays, Sundays, Wednesdays and the following legal State holidays: Nevada Day, Veterans Day, Thanksgiving, Family Day (day after Thanksgiving), Christmas, New Years Day, and Martin Luther King Day. Hunters with a valid turkey tag for the Mason Valley Wildlife Management Area may hunt each day of the established turkey season. Before or after the waterfowl season, hunting is allowed every day for wildlife species upon which there is an established open season.
2. AREAS CLOSED TO ALL HUNTING ADJACENT TO THE FT. CHURCHILL WATERFOWL SANCTUARY: Those portions of SE corner of Section 36, T.15N., R.25E; W ½ of Section 31, T.15N, R.26E, and N ½ of Section 1, T.14N, R.25E., M.D. & M. are closed to hunting as posted.
3. The following area within the Mason Valley Wildlife Management Area is designated as a CONTROLLED GOOSE HUNTING ZONE and will be closed to all persons five (5) days prior to the last Saturday in November through the end of the waterfowl hunting season, except for those persons having a valid Mason Valley controlled goose hunting permit, described in #4 following. Prior to the described closure dates, all legal hunting is allowed within the CONTROLLED GOOSE HUNTING ZONE. Those portions of the Mason Valley Wildlife Management area within Sections 1, 2 and 12, T.14N, R.25E; Section 35, T.15N, R.25E; Sections 6 and 7, T.14N, R.26E, and Section 31, T.15N, R.26E, M.D.B. & M. as posted. The assigned blinds for the controlled goose hunt are located in farm fields MV-10, 11, and B-11, 12, 13, 14 and 15.
4. Hunt permit applications for the CONTROLLED GOOSE HUNTING ZONE within the Mason Valley Wildlife Management Area are available through the Headquarters Office in Reno and the Western Region Office in Fallon. Unless their privilege is limited or revoked pursuant to law, any resident or nonresident is eligible to apply once for a hunt permit. A person whose name appears on more than one application will be rejected from the drawing. Permit applications will be accepted for groups no larger than four individuals, and all members of a group must hunt from the same assigned location. Applications for the Special Mason Valley Wildlife Management Area Goose Hunt shall be received at the Headquarters Office in Reno (through a postal service only) no later than the second Wednesday in October. A public drawing will be held at the Headquarters Office in Reno at 10:00 a.m. on the last Wednesday in October. Successful applicants will receive a permit by return mail.
Bodies of Water
* Hinkson Slough
* North Pond
* Bass Pond
* Crappie Pond
* Walker River
Trespass: Trespass prohibited from Feb. 15 through Aug. 15 in the eastern portion of the main developed pond area, as posted.
Use of Vessels: All vessels are prohibited from Feb. 15 through Aug. 15 each year, except on Hinkson Slough, Beaver Slough, Bass, Crappie, and North Ponds and the Walker River. Vessels must be operated at a speed that leaves a flat wake, but in no case may exceed 5 nautical miles per hour.
Use of Campfires: Permitted in those sites designated for camping.
Camping: Permitted at sites designated by the Department.
The use or possession of shells for a shotgun containing shot that is toxic or larger than standard-sized T is prohibited.
The use of shotguns capable of holding more than three shells is prohibited unless it is plugged with a one piece filler, incapable of removal without disassembling the gun so its total capacity does not exceed three shells.
Hope this helps ya out!!