The first thing you need is a Switch — a regular one, not the Switch Lite. If you already have one, you’re good to go. If not, they’re not as hard to find as they were last year during the height of the pandemic.
The original Switch has a paltry 3-6 hours of battery life. The updated 2019 Switch is better, but it can still benefit from a beefy battery pack. This 10,000 mAh, 18W quick-charging battery grips the console and promises to extend battery life by 8 hours. The Joy-Con grips are optional and can store one extra game each.
Nintendo added an ethernet port to the Switch (OLED model) dock. Want that sweet wired connection? Hori already makes a LAN adapter for the OG Switch, which can reach download speeds of up to 480Mbps. If you routinely download large games or like to play online, a wired connection is the way to go.