Fall photos wth a month and a half old baby

Okay ladies....... Photo tips would be great... I have a 5 year old and his sister that is almost a month and half...... I want to do some fall photos... Not sure if we are gonna do the pumpkin patch or just do some outside with fall colors.... But how in the world do you make it work.. I didn't really do much with my son when he was this little so I have no practice.... Pose ideas and tips to make this go as smooth as possible with the best outcome..... I've looked up poses on Pinterest... And all the babies I see are bigger.. My daughter is little and my 5 year old is 45 lbs and 45 inches tall....