Use the heaviest weight you can for each set.
Rest as needed between sets.
-- then --
Road Run, 65 lbs, 1000 m (gym to beach)
Road Run, 65 lbs, 1000 m (beach to gym)
Split into 2 teams:
65 LBS per team member
Team members can carry each others weight
Weight can be comprised of: Kettlebells, plates, weighted vest, wall balls, slam balls.
2 different items minimum per team member.