It sounds as though you want to prevent needing to P on the way home? I just pull over and P without dismounting. Quick and easy. I used to worry that somebody would see me. Either they don't, or they don't care. It helps that I have a big handlebar bag that's in the line of sight for cars approaching head-on. Ping freely is how I cope with having an enlarged prostate. If I'm outdoors I can find a spot almost anywhere.