You could just book each of you on a separate reservation.
yep, But Id book both on the same PNR and then after its tkted call up and ask that they split the res into 2 reses .That way the Mrs gets her own but since it was originally booked as 1 the both of them will still get the free bags that David is entitled to. On the way back the Mrs checks in the bags and David checks in none. Mission accomplished
Theres no problem doing this with CO at all. When asked why just tell them in order to get the Upgrade chances improved. Before doing this,Id make a res for the 2 of you and see what happens, if its with UA since you will have 24 hrs in which to cancel the res for a full refund. Dont use the exact cities you will eventually be traveling to so that way theres no paper trail.If its a AC or ANA tkt ,You Got Me