TTM newbie question

[almostdone]

I am just starting to do through the mail autos for fun. I have gotten back a few so far and have enjoyed it. So far the majority of what I have sent have been cards but I have done a couple of baseballs and gotten them back (Bobby Doerr and Minie Minoso).

My question is does any one have any good advice on how the best way to send a ball with a SASE? I mean in the area of packaging expecially without have to make a special trip to the post office and stand in line. That is what I've done so far but it is not convienient considering the distance from my home and work.

Any tips or advice on this or anything else on TTM auto would be greatly appreciated.

Thanks,
Drew