Several people have mentioned going to the mountains, which I highly recommend if you are on a pre-planned chase vacation somewhere in the western Plains and there is no prospect for storms. However, there is another reason that others have not mentioned - there is a good chance that you will see storms there, even if there are none on the Plains. Now, don't get me wrong - you won't see supercells - but you may see some interesting and unusual weather - including hail (usually small, but sometimes prolific), intense outflow winds, and maybe even thundersnow. Storms often occur in the mountains because, when surface winds hit the mountains, they are forced upward, creating updrafts. And in the clear air of the mountains, whatever storms occur you will likely see well, as long as you can get to a spot with a clear view. Northern New Mexico, Colorado, Wyoming, and if you are really northwest, Montana are all good places to see mountain storms.
For a few examples, see my "thunderslush" post from yesterday in W&C, or the following from my Web pages:
http://www.siue.edu/~jfarley/obs61406.htm
http://www.siue.edu/~jfarley/obs60606.htm
http://www.johnefarley.com/IMG_3066.jpg
I might also mention that, even with all my chasing, the only time I have seen thunderstorm wind take down a large tree (I mean it actually happening, not the aftermath) was in the mid-1990s on a trip to Yellowstone with my daughter - there was strong outflow wind from an approaching thunderstorm; we heard a loud CRACK and down came a 60 foot pine tree at the edge of the road (not into it, luckily).
For those of you unfamiliar with the mountains, be aware that often there are storms with little or no precipitation that nonetheless throw down CG lightning, so even if you are not in rain and don't see rain shafts, beware of lightning if you are in an area where convection is occuring. As to bears, well all I can see is that in the time I have spent in the mountains, I have seen many more thunderstorms than bears, despite many efforts over the years aimed at seeing bears, LOL!