According to Hawkeye in this episode, his family has a summer cottage in Crabapple Cove, Maine. Any other time Crabapple Cove was mentioned in the series, it was his hometown.
In Season 3 "Payday" Radar hands out the officers pay in envelopes while Hawkeye hands out enlisted pay and having them sign for it. This episode Maj Burns is handing out pay to enlisted men as well as officers.
At the wake, all the beer cans are empty. They are held two at a time from the top and at least one is dented.
When Hawkeye jumps out of the shower, the undergarment he is wearing (to avoid actually being naked on set) is momentarily visible.
The beer cans being passed around during Hawkeye's eulogy are extruded aluminum cans, the dimple in the bottom can be seen. This type of can was not in general use until the 1970s.
In the beginning when Klinger and BJ wake Hawkeye up, he asks what time it is and Klinger tells him it's two o'clock in the morning. Hawkeye then asks what time it is back in the States, and BJ says it would be 18 hours earlier, thereby making it "eight o'clock last night". But assuming Hawkeye's father was calling from their home in Maine, he would only be 13 hours behind Korea, not 18 hours. Moreover, 18 hours ahead of 8 p.m. would be two o'clock in the afternoon, not two in the morning.