As a tech bro myself. I'm with you on your own WAP. Never use default. pfsense or opensense ftw.
Take control of your routing.
As for connection, it's a tough one. Starlink is going to give you the bandwidth you'll require for youtube and other stuff. But it's not going to give you the ping rates you desire. A Verizon Hotspot is going to give you a better ping rate, but neither are as good of a ping rate as at home. You'll probably get better heavy bandwidth usage out of Starlink and it is in more places. (Should be in all places technically).
Your local LAN games will be just fine, but if the games aren't truly LAN but connect to online servers elsewhere (WAN connections) then you'll notice issues and delays. Steam connections for validating your games is no issue on either of them, and if you're hosting the online server on your bus, people from the WAN will suffer playing on your server. Verizon is going to be better for the ping rates by far and if you plan to be within a verizon network for most of where you stay, it'll be fine.
Might also want to consider T-Mobile hotspot too as they operate on a lower hertz frequency than Verizon which gave them better coverage than verizon as of 1.5 years ago, and T-Mobile just started selling their Internet brick.
The lower the frequency the better the coverage distance wise, but if they go too low you suffer on bandwidth but T-Mobile isn't so low it's an issue.