eastcoastshredeturf cost money and that is something i do not have any of. tarp is just laying around'
If you don't have any money to spend on turf then I would recommend either stealing construction fencing or buying some. The tarps just aren't worth using, they aren't going to be fast enough or slide well from past experience.
You could lay them on the sides of the rail to land on if you fall off early since that's better than grass/dirt. Or you could lay them on the walk back to the drop in so you don't track any dirt onto the drop (dirt slows you down).
Home depot sells construction fencing that you can use for both the in run and landing. It's only $30 for 400 sq feet. If you don't have $30 to spend then you probably shouldn't be building a drop in.
Link to construction fencing: http://www.homedepot.com/p/Tenax-4-ft-x-100-ft-Orange-Barrier-Guardian-Safety-Fence-998044/100384030?N=5yc1vZc3m0