There are some travel potties thaT may help. I got a safety first one at Walmart that folds up a bit, seat can be used as a reducer on a toilet and bowl is collapsible. There is the added option of removing the bowl and using ziplock bags which you can discard. At least that would help with not having to clean the bowl. I know some moms like the potette model but I haven't seen it in person and it doesn't have a bowl. It may be lighter or smaller than the one I got and with the bags it may work for your needs. Just a couple of ideas :-).
I started DD at 11 months and she is not at all willing to be held over a toilet or sit on one. This girl likes to have her feet planted firmly on the ground lol.
Good luck, I hope you find something that works for you :-))