Its always a good idea to get a travel book of the Somme and I highly recommend Holts Battlefield Tours book - obviously the one on the Somme. (They do one on Ypres as well as others) Amazon stock them..
I suggest you visit Thiepval Memorial - great new visitors centre there.
Just down the road from that memorial is the Ulster Tower. Two friends of mine, MAureen and Dom run it during the summer months and he does a great tour of Thiepval Woods opposite with its trenches etc. You have to book the visit but its brilliant and well worth it. They have a good cafe there with outstanding views of both front lines that you can still see when no crops about.
Also nearby is Hawthorn Ridge and the Sunken Lane. You may have seen the pic of the lads waiting in it before going over.. most of them were killed minutes later during the attack. If you walk to the top of the lane you will be able to visit a few little CWGC cemeteries in the fields. They are not well visited so I always make the effort to pay my respects..
Newfoundland memorial park and Sheffield Park are also good to visit..
Finally if you do go to Ypres there is the last post ceremony at 8pm every night. The Cloth Hall has a great museum and Tyne Cot Military cememtery and memorial is well worth a visit purely for its size and gives you a real sense of the loss suffered by this Country and commonwealth..
I hope you have a great time and have a beer for the boys

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