2/5 river checkraise from recreational

2/5, weak passive table, hero has been running it over, but main villain in this hand just sat down an orbit or two ago. He's middle aged and been pretty active, assumed rec. He saw hero iso raise Q7o from the button and get two streets of value, as well as a few hands where hero raised and won with a c-bet or barrell

around 800 eff.

MP limps, hero on button raises K8cc to 25, villain in SB calls, BB calls.
Flop (100): 6s 6h 7c
checks around

Turn (100): 9s
checks to hero, bets 50, sb calls, others fold

River (200): Kh
V checks, hero bets 70, V thinks a bit and raises to 230, hero... ?

Wishing I'd just checked it back, but I'm feeling inclined to bluff catch. Boats are possible, but not that many recs are checking trips on the flop and then x/calling them on the turn. Also, I guess when rec's x/raise the river I'm inclined to either
A. assume they have the nuts, or
B. account for some spazziness, depending on player type