Welcome to the main event!
Road networks across most of Kansas are great. As
@Todd Lemery said, be cautious on dirt roads, especially if it's raining or has recently rained. Terrain is favorable throughout much of the state, but there are some hills and trees in eastern Kansas, especially east/southeast of I-35. Oklahoma is split. Use I-35 as the rough dividing point. East of there features a lot of trees, while areas to the west are mostly open. Climatology says if you chase in Texas, you'll most likely be in the panhandle, West Texas or North Texas. Texas near the Red River has mixed road networks and some trees. Terrain is more favorable out west and in the panhandle, but road networks can be spotty. Since the visibility is usually good, this can make up for some of the gaps.
Reference this thread for a great map by
@Jeremy Perez about road networks, terrain and forest canopies:
https://stormtrack.org/community/threads/us-chase-map-project.28377/page-2
For chaser convergence, avoid chasing near bigger cities, especially anywhere close to Oklahoma City. Plan to give yourself a little bit of extra time. Convergence will rarely slow you down from getting to a target in the morning or early afternoon, but once storms fire, it should at least be a consideration.
If you're staying at hotels, I compiled a list of affordable, yet reliable hotels around the Plains. If you're looking for luxury, this might not be your list, but it is selective and factors in cost and comfort.
http://www.quincyvagell.com/2016/03/01/affordable-lodging-midwest-plains/ I need to update that list and fix permissions for the Google Map, but I'll have that done within the next 24-30 hours.