Welcome!! All in all the food looks pretty darned good, especially for a first time. A couple things to note however. You mentioned doing whole hogs over hickory coals. Although the MES is a good unit with some great advantages, you simply won't get the same flavor from an electric smoker that you'll get from one using a real fire for a heat source. Someone else with more background in the chemistry of meat can jump in with the overall dynamics of how it all works :-)
I feel your pain with the asparagus. We all love it around here and I tried smoking it one time, with the same results you got. I think the stuff is just too soft and porous thus will take on a LOT of smoke flavor. What I do now is toss it in a large bowl with a bit of olive oil, garlic, black pepper, and real bacon bits. Then i put it in a square grilling wok and put it on the grill. What I've found works best is to light the two end burners, leave the one in the center unlit, and put the wok with the asparagus in the middle. It cooks very nicely but still gets a bit of the "outdoors" favor from the grill without being overly smokey. Just a thought that you may want to try.
Thawing out in Lago Vista,
Robert