I did my best to look at your hubs and see if I could see any problems of any sort. I don't see anything obvious on the hubs themselves. I looked at your source code and your google analytics number seems to be in place, so no problems there.
I took a few exact sentences from several of your hubs and searched them. When I searched for an exact sentence from your Florida hub, the hub showed up in the 5th page of search results. I did the same thing for another hub and the hub showed up 3rd on the 1st page of results. My point - Google has not totally blocked you; you do show up in search engine results, but perhaps you are not ranking as high as before.
I also checked your page rank for your subdomain: donbobbitt.hubpages.com. Your do have a page rank, so you are not blocked. Your PR was 2/10 and mine is 2/10. Hubbers from the success stories Patty Inglish and Marye Audet have a PR of 4/10. Steph Hicks has a PR of 3/10. So, you do exist as far as google is concerned.
Does most of the traffic that you had before mostly come from a couple of hubs or is it spread out? I ask because if most of your previous traffic was to just a few hubs, maybe the source of that traffic is the problem. For example, a popular inbound link may no longer be functional. Or is most of your traffic from organic google searches?
Or perhaps the traffic you had was seasonal in some way. You write a lot of RV hubs. Is RV traveling more seasonal?
Of course the cause may be none of these things, but these are possibilities for anyone experiencing a drop in traffic. My guess is that Google has perhaps gotten to your subdomain and is examining its content. This drop may only be temporary.
Hang in there Don. I for one would miss your writings - like the Sunday morning talk shows and politics one you just published.