Doing a rough boarding out of the loft for storage. What to tape the joints with?

I feel duct tape? I'm rarely going to be up here. Christmas tree and luggage cases mostly. Just figure it would be a neater 'finished' job if I tape over the gaps.

Any tips?

I feel duct tape? I'm rarely going to be up here. Christmas tree and luggage cases mostly. Just figure it would be a neater 'finished' job if I tape over the gaps.

Any tips?