One word of caution if you're flying Long Beach - you have to walk out onto your plane via a ramp; there are not jetways. In the rare event of uncomfortable weather, you may be exposed to the elements boarding/exiting.
If you fly Southwest out of LGB, note that your boarding position may carry even more importance than usual. On my family's recent flight, they were boarding both the front and back of the plane at the same time with different ramps. My family had a decent "B" boarding group, but an elderly man directly in front of us was having challenges boarding at the front of the plane and held us up for ~5 minutes.
This resulted in the entire "C" boarding group going to the back of the plane to board because the line was moving, and by the time we got on, only middle seats were left, and my children, who are too old for "family boarding" but still elementary aged, wound up having to sit on their own with strangers. (Luckily, I convinced one person to move so that our youngest wouldn't be by themselves.) I'd never fly Long Beach again without paying for an upgraded boarding on Southwest because of that. While our situation was probably isolated and not very common, boarding Southwest from the front and back of the plane at the same time definitely was making things more chaotic for people, regardless of when they boarded.
