Keeper league and trade advice

Part 1

I am in a league that allows 2 keeper players that will count for the round prior to where they were drafted and I've never done a keeper league before. 12 team, 1 pt PPR, 2 wr, 2 rb 1 wr/rb flex, 1 TE. Don't have to decide on the keepers until an hour before the next draft. My current record is 9-0-1

I am considering the following for my 2 keepers:
*Antonio Brown (drafted in 5th rd)
*Gio Bernard (drafted in 7th rd.)
*Josh Gordon (drafted 10th rd)
*Jordan Cameron (drafted 12th rd)
*Alshon Jeffery (drafted 13th rd)

Any opinions on my best 2 options here?

Related Part 2

I have already clinched a playoff spot and am considering a trade offer for Brandon Marshall to a guy who is not doing well and needs a lot of help to be playoff eligible. He has advertised that hes looking for a RB and that all WRs are up for trade, including B. Marshall.

My Team:

QB Colin Kaepernick,
RB LeSean McCoy,
RB Darren Sproles,
RB/WR Giovani Bernard,
WR Antonio Brown,
WR Alshon Jeffery,
TE Jordan Cameron,
D/ST Panthers
K David Akers,
Bench Joique Bell,
Bench Bryce Brown,
Bench Josh Gordon,
Bench Alex Smith,
Bench Greg Olsen,
Bench DeAndre Hopkins,

His Team

QB Case Keenum,
RB Chris Johnson,
RB Brian Leonard,
RB/WR Cecil Shorts,
WR Brandon Marshall,
WR Keenan Allen,
TE John Carlson,
D/ST Bengals
K Mason Crosby,
Bench Tony Romo,
Bench Jason Witten,
Bench Kendall Wright,
Bench Titans
Bench Marvin Jones,
Bench Aaron Dobson,

I am trying to balance a good run at winning this year with stacking the deck for next year. Any proposals for a trade to get B Marshall, or just stick with what I have (had Julio and Reggie Wayne earlier this season )

Would like to offer Sproles and a WR or TE of Marshall, but realize that leaves me with no RB depth (and no real Rb for next week's game ) If not Sproles, should I be OK with offering Gio and a WR/TE or should I keep some level of depth for the playoffs.

Thanks