That is how I set my 905G as well... NOW I'm thinking of added a https://baofengtech.com/product/amp-u25/ in my Jeep to give it more power instead of purchasing another radio because I use several HT in my Jeep.
Food for thought... If this works for the way you will be using your Jeep as a base unit. I would look at a Cross Band Repeater unit so can get more walk around or hiking area using a HT to communicate to your parked Jeep in my case which will reach a repeater from the Jeep mobile unit with better antenna and more power. Still studying this option. Have not picked my mobile radio yet or just do a GMRS Amplifier for UHF (400-480MHz), 20-40W Output (2-6W Input), Analog and Digital Modes, Compatible with All Handheld Radios.
Keep in touch... and if anyone has a Cross Band Repeater setup for GMRS let us know...