Mr. Silver -- Sorry to hear about the wipe out! I hope you recover quickly and completely!

Your car / bike shuffling plan sounds like the old riddle about three missionaries and three cannibals on the bank of a river that they wish to cross. There is a boat available which can ferry up to two people across. The goal is to find a schedule for ferrying all the cannibals and all the missionaries safely across the river. But if at any point the cannibals outnumber the missionaries on either bank, the cannibals will eat the missionaries. Note that the boat cannot cross the river by itself with no people on board.

One possible solution (highlight to read):
Missionary 1 and Cannibal 1 cross
Missionary 1 returns
Cannibal 2 and Cannibal 3 cross
Cannibal 3 returns
Missionary 1 and Missionary 2 cross
Missionary 1 and Cannibal 2 return
Missionary 1 and Missionary 3 cross
Cannibal 1 returns
Cannibal 1 and Cannibal 2 cross
Cannibal 1 returns
Cannibal 1 and Cannibal 3 cross

And remember -- Chics dig scars!