"Man, you've improved so much since the Bay of Islands," said Foster, who holds the Port of Tauranga Half and New Zealand Ironman swim records. "I tried to pick you up through the entrance but you were gone."
Campbell-Macdonald will line up in this weekend's 3.3km Capital Classic in Oriental Bay but couldn't tempt Foster to head south for a tiebreaker.
Yesterday he was more than three minutes off Moss Burmester's 2005 race record of 44m 28s but credits the Round the Mount swim for getting him back in the water seven years ago.
"I come up here especially for this, it's worth the trip, not just for the swim [he also won Saturday's Murray Dingle bridge-to-bridge swim in Tauranga Harbour] but also for the marine life you see while you're in the water.
"I was keeping an eye out for any debris [from the Rena] but it was real fishy out there today, a bit like a soup with what looked like heaps of krill in the water."
Campbell-Macdonald was surprised Foster didn't sit tighter, although the'98 world champion surf athlete is recovering from a virus he picked up after the Paihia race.
Foster hasn't competed at the Mount for several years but has fond memories of the main beach, having won numerous New Zealand surf, tube rescue and belt race titles there.
"And I'm usually a starter in the Half too as a swimmer for one of the teams, only I didn't get the call from Carl [cyclist Carl Murray] this year and entries had closed by the time we got organised."
Bescheron, who swam for France until she switched to surf lifesaving as a 17-year-old, is clocking up 5km each morning in the pool at Baywave but said the currents and navigation required to get around Mauao made yesterday's swim tricky.
The 26-year-old is based at Hossegor in southwest France and will compete for Mt Maunganui at March's national surf lifesaving champs in Gisborne before heading home, hoping to win a medal in at least one of the run-swim-run, tube rescue, surf race, surf ski or ironwoman.
]She'll be back downunder in November competing for France at her third world surf lifesaving championships in Australia.
Campbell-Macdonald won the bridge-to-bridge swim in 11m 23s, holding off Adam Simpson (11m 56s) comfortably, but it was tight in the female race with Jessica Miller and Cara Ryan swimming stroke for stroke until the final 100m, when Miller pulled away to win by three seconds.