Semi-common situation with K7s

[rafct]

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It would be very hard for him to raise a river donk on a non-scare card unless he has a very good hand. A "very good hand" includes things such as kings that outkick us (be aware of the cards that fell, because some combinations give you chops and you would be better check-calling those). There are a wide range of players who will bet/raise the flop and turn but check behind on the river with medium-strong hands (like a pair of queens), and I want those players to pay off a bet rather than take a free showdown.

This is villain's first hand, so you're trying to develop a read without sacrificing lots of EV.

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WHile I really like this line for this kind of situation, I get worried about not having a read for the opponent, and if he is somewhat maniac/bluffer his river raise can cost us the whole pot. Maybe it is acceptable to bet/call?