The Future Lies in the Past, part six: Backpacking Through the Past

This will mostly discuss question # 1 of my time-travel theory.

Here's that question again:
1] Does he "travel" alone or does he take trusted friends with him, and does he travel light or take as many handy items as he can carry on his person?

I won't be able to say anything regarding whom he might take back in time with him (though Ron's nifty new watch and his decreasing helpfulness throughout the books suggests that it could be Ron's time to shine and come through for Harry in a big way), but I have some ideas of what Harry might take with him when he travels, and it won't be all that much.

a] wand (duh),
b] that Advanced Potions book Snape would like to get back. It could help deal with whatever is in that basin in the cave....,
c] two-way mirror, to contact Regulus A. Black,
d] perhaps the Pocket Sneakoscope (it wasn't faulty, it detected Peter Pettigrew),
e] Ron's watch or maybe Dumbledore's watch (if he gets hold of it somehow, like from Dumbledore's will?),
f] some galleons from his vault,
g] something he might find in his vault (or Black family vault) when he's preparing to travel....

I'll have to update here as I think of other items he might take.