I am looking for 4 seats LAS-SEA for next summer (end July).
Even though there are 12 flights a day there is literally no availability (if I understand correctly it would have to be W class, or A for First).

I am wondering whether I am either too late, or perhaps too early ? I would have no problem waiting a bit longer as long as that's when availability usually opens up.

Second question would be regarding baggage allowance. From the AS website I understand there is no benefit for BA G members. Is that so in practice ? In this case I would consider to book one person into F (at 22,500 Avios over 7,500 in Y, again if I understand correctly), to check our two bags for free.

Alternatively I could book 4 seats on AC to YVR using M&M, but it's slightly less attractive at 15,000 miles pP plus $26 in taxes.

Thanks for any expert advice!