1-3 game with $10 straddle on button just about every hand. Avg stack is btw 800-900. Hero has close to 900.

PRF
Hero has KQQ2ds. There is a straddle and 2 limps. Hero raises 60. CO and Button call, with the limpers. 5 way action
pot~ 300
Flop
K Q 3 r
checks to hero...The spr is ~ 2.75. Hero checks, which in hindsight I really dont like. My logic at the time was by checking I protect a lot of my range that cant bet, which is a big portion, and since we block a K, depending on our sizing, it may be hard to get called by a lot, so inducing a bet may be best case to extract value. Also, button is overly aggressive but not incompetent player who was stuck at the time. Plus, they all have most of their KK combos to this point, but I'm not folding at this stack depth anyway unless there is some ungodly action. So, am I wrong to say this is a fist pump bet???
Turn
3
Flop checks through, and like a boss, we catch a favorable card. Checks to hero...we bet 155. Button raises to 345. We have about 700 behind facing the raise. I think Button would raise 3+ for this sizing for value, but also bluff this spot a bunch given my perceived range looks capped. I called in game, but I think better play would be to click it back...what do you guys think?
River
6
checks through and we win.

I think my fundamental leaks are flop decisions like this and playing at this awkward stack depth. I find myself too often looking to cr and get most of the money in, instead of just betting. Could you guys give me some insight as to what general reasoning goes through your mind in these spots?

Also, I know this is getting long, but what are you guys thoughts on preflop play in these games? Should I be limping everything while looking for good spots to limp re raise? Or is it fine to raise with a solid range knowing you will get 4 callers?