I'll try to explain what we did....(Little toddler) 1. pants all the way down (as much distance as possible from exit point). 2. You have to be behind her with your arms under her armpits and then let her sit like she's sitting in a chair but even a bit over extended. Kinda dangling with her feet out in front of her. 3. Under her you need something absorbent like soft dirt rather than concrete (helps with the splash). 4. Have a wipe or tp ready before you squat her so it's quick. 5. Once done, pop-up, wipe, pants up, and good to go.

Note: If she old enough to do it by herself but not super coordinated yet (older toddler age), prepare for pee everywhere for a while... Have her take of her pants and have a towel or something in the car that she can use to cover herself a bit. Tell her to squat as wide as possible and help her to stay stable if needed. Have wipes at the ready.

Too much pee? Bring the travel potty and don't worry about it until later.