is you have directional antennas you could use ubiquity bullets get the HP model but would need more about the antennas you have 

also take a look at this https://airlink.ubnt.com/#/ for calculating the link and what heights although wont help with trees

if you buy from amazon you should have 30 return period thats easy to do

yes you can bridge and retransmit with this setup 

emails good if needed