Found the following summary of the Jeff Dahn video that Phximiev identified -http://powercartel.com/2014/11/notes-from-why-do-li-ion-batteries-die-lecture/
At Dalhousie University they have come up with techniques for predicting battery life based on very accurately measuring various parameters, especially utilizing precision microcalorimetry. In the video (which I finally watched but admit to falling asleep at some point) prof. Dahn addresses the problems facing manufacturers in trying to determine life expectancy and offers them help in that area - yes, I thought there was a little bit of a sales pitch in there; however, he does present a lot of useful information along the way, and it is also quite up-to-date.
Since I'm not in the business of building cells and batteries but am simply the end-user wanting to protect my investment, the message I got from all this is even more emphasis on NOT fully charging the pack in high temperatures and then letting it sit there, as high cell voltage + high temperature = bad news.
From a practical standpoint and for the time duration of interest to me I gathered that not much harm will come from fully fully charging just before taking off and then discharging the pack. Talking with Terry Kershner who has racked up more long-distance trips on his modified Zero electric motorcycle than just about anyone, I understood that he actually even slightly overcharges his pack (in order to squeak out the most available kWh), with the proviso that he takes off immediately after charging.
For anyone interested, there was more discussion on this topic on EVDL http://www.evdl.org/archive/index.html
on the topic titled "Enerdel Battery Experiences", but you need to start at Page 2 before they get into the nitty-gritty of temperature and battery life discussions. Sorry, I don't know how to link to that specific thread.