i've no comments on your particular river run. but i have done Omaha to souix city on the missouri river on a pwc. dwc has good comments.
planning is key. especially fuel stops. i got a chart from the army corp of engineers. it's a paper chart and took some time to acquire it. i used it some, but it was a pretty straight fwd. run for me.
hopefully you go up river from the start of the run (if things go badly, ya can always float back to your start location if you have to). up river will consume much more fuel. up river will be more time consuming. understand river somewhat. like the deep side of a river is the outside of a bend in the river. shallow on the inside of a bend. if there are daymarks or nuns and cans, use them to stay in navigable waters.
one thing for sure. if yer jet skiing, for sure. is bring sunscreen. i didn''t. i've boated most of my life, but never had done a long river run. when on the river there's no hiding from the sun. for me, it must have been somewhat cloudy going up. but come down it was plain ol sunny out. after 105 miles one way. we were beet red and in pain for a week or so after the run. sun screen is now a base item onboard.
plan your food. stuff that dont spoil. we did peanut butter.
be sure yer ski is in top working condition. i found the missouri quite isolated. there was nothing. no help from anyone. no where to get services. your really on your own. so take stuff for life preservation. first aid kit, water, flares, gps to know your location, cell phone, or vhf or both.
have fun. my run was one of my most exciting runs i've ever done. so do it. just have much planning. i think i planed for 6 mo. prior to my run as i'd never done anything like that. i also didn't have locks to deal with. nor shipping barges. but there were some very large motor yachts that threw of very large wakes. there's no where to run from them on the river either. ya gotta deal with them. the Missouri also has much debrit in it. ie. dead head logs, refrigerators, all kinds of stuff that can ruin your day. keep a a good lookout.
hope ya can do your run. you'll have a lot of fun if all goes well. it's an adventure that many don't experience.