The 8283 is a statement you send with the the $500 filing fee for donations over $10,000 to a charitable organization, so I'm not sure where that comes into the picture? 

An individual's non-cash charity contributions are reported on Schedule A and if they are all to the same charity, you could enter the total, I would think. Make sure the client has all their receipts with the details, in case the IRS questions the deductions. Verify how the value was determined and who made it. A person can believe something has a value in their mind but the actual value, especially in non-cash contributions, can be lower. Also make sure they are not receiving any thing in return for the contribution, which will off-set the value, and have that in writing from the recipient.