A good friend of our attended West Point and DD is a current USNA Firstie, so here are a few observations regarding summer training that I've gained from conversations with them.
Plebe Summer -
USNA: 0 nights spent sleeping on the ground. Academic placement tests, lots of time doing PT, learning about damage control, handling small sailboats, learning to drill, doing the obstacle course and endurance course (run through the woods in boots and utilities). One day spent in rifle and pistol qualification.
WP: A significant amount of time is spent living "in the field," with ruck marches, firing weapons, and "running around in the woods." (Not meant in a bad way, just the phrasing he used.)
Other summers:
USNA: Youngster summer: one "grey hull cruise," plus one other block (could be sailing, NASS squad leader, soaring, or various other options). The grey hull cruise can be fantastic (sub cruise from Pearl to Japan with time for liberty at each end), awful (one month tied up at the dock in Norfolk with no transportation), or anything in between.
WP: Yearling summer spent at Camp Buckner. Lots of weapons firing, squad tactics, etc.
(I don't have WP info for later years)
USNA 2/C summer: PROTRAMID = ~1 week each spent with Marines, surface fleet, subs, and aviation (Navy or MC), plus one other training block (lots of options, including internships)
USNA 1/C summer: one block spent with a service selection area of high interest to the Mid, i.e. "Leatherneck" is now nearly mandatory for Mids who want to service select Marine Air/Ground. Lots of options for the second training block, as for previous summers, this time including being a detailer for Plebe Summer.