Long session, up 1/2 buy-in

I was playing really well - up 2 buy-ins pretty early. I stacked this huge donk with a set:
http://www.pokerhand.org/?1511904

He decides to play back at me and hits a 5-outer to stack me. I like 4-betting him pre-flop as well as checking the flop - it lets him bluff my "AK". Too bad he hit on the river:
http://www.pokerhand.org/?1511918

Not sure what to think of this one on the river. I have trips and get check/min-raised on the turn. He shoves the river. It's just hard for me to fold trips to some of these guys though:
http://www.pokerhand.org/?1511924

Nuts vs. 2nd nuts + redraw for me:
http://www.pokerhand.org/?1511934

Not sure how I feel about this one either. I guess I'm committed on the turn:
http://www.pokerhand.org/?1511938

Standard vs. short-stack donk:
http://www.pokerhand.org/?1511944

So basically I got coolered a lot vs. a bunch of people. I still had enough winners to make it a winning session though.