What do you guys think about these hands?

CO was new at the table so no read, button's numbers were 42/6.5/1.5 and goes to the SD 47% of the time.
Hand 1
Prima Poker skin
Limit Holdem Ring game
Limit: $1/$2
6 players


Pre-flop: (6 players) Hero is SB with
UTG folds, UTG+1 raises, CO calls, Button folds, Hero 3-bets, BB calls, UTG+1 calls, CO calls.

Flop: (11.5SB, 4 players)
Hero bets, BB calls, UTG+1 calls, CO raises, Hero 3-bets, 2 folds, CO caps, Hero calls.

Turn: (10.75BB, 2 players)
Hero checks, CO bets, Hero calls.

River: (12.75BB, 2 players)
Hero checks, CO bets, Hero calls.

Results:
Final pot: 14.75BB

Here I figured someone would bet this just going off the last few hands thses guys were involved in, they tended to be a "bet if checked to" players, figured I was up against Ax with one of them. Had they had a big A (AT+) I would've expected a raise. I know my PF limp was kinda weak but there were quite a few stations who would bet/call down bottom pair. So I was taking the line of hitting disguises my hand and missing gets me away cheap
Hand 2
Prima Poker skin
Limit Holdem Ring game
Limit: $1/$2
5 players


Pre-flop: (5 players) Hero is SB with
UTG calls, 2 folds, Hero calls, BB checks.

Flop: (3SB, 3 players)
Hero checks, BB bets, UTG calls, Hero calls.

Turn: (3BB, 3 players)
Hero checks, BB bets, UTG calls, Hero raises, BB calls, UTG 3-bets, Hero calls, BB folds.

River: (11BB, 2 players)
Hero checks, UTG bets, Hero calls.

Results:
Final pot: 13BB

Hand 1: Lead the turn and call down if he raises. unlikely he flat called AA,KK or TT. You're only scared of 44 and 66 here and 44 is very unlikely.

Hand 2: You have to raise preflop. Its hard enough being out of position against one guy. At least make the BB pay if he's staying in. The only exception is when you get mulitiple limpers and you know none will fold and you dont want to tie them to the pot. In that case, calling preflop and leading out on any board is something people have suggested, although i dont like that either.

Other than that, since you're going for the disguised hand approach, checking the flop is fine, but i'd checkraise it right there instead of holding off to the turn. Turn play is read dependent, but i'd cap it off against a lot of players.

Edit: since BB seems like a station, flat calling is ok too i guess (in the hope he'll go to showdown although he didnt in this case). You'd get the same amount of bets into the pot without putting further bets of your own in.