So I've put about 250 miles on it since I attempted to burp the system last night, covering all sorts of terrain and grades, including some light offroading (this is my job). Mostly stayed around the 210-222 range. Towards end of the day today it began the weird extreme fluctuations - would be at normal op temp and then spike to 228 and inch up in the 230s, then drop back down to 226 or whatever. Or running for a minute around 228 and then spike to 248 (that only happened once) and drop to 235. But mostly.....mostly it ran as expected today.
We are going to burp again tomorrow, and this time I'll have help. I was impatient waiting for my husband to get home last night and just did it myself.
Thank you so much to everyone who has given advice and thank you for allowing the thread to remain open despite me hijacking it. 
