cutting joints?

[Coaster]

Hello,
I am thinking of building my own gate with rough sawn timber frame.
I was just going to put them together and fasten them somehow as I can't cut neat joints, so would it be better to use coach bolts to hold together a 6' square frame of 4" x 3" peces of wood (with 1 diagonal length from one corner to the other to strengthen it) or would wood screws make a better fastening, or is a badly cut joint still a better option

 

[PowerTool]

4" by 3" is rather hefty timber - will be very heavy!
I would go for screws,rather than coachbolts (easier and cheaper)
And if you are putting a diagonal strut in,make sure the bottom end is at the inside (hinge) edge,otherwise your gate might droop

 

[Coaster]

Thanks for your advice PowerTool.