I think it depends on the conditions you have, how much weight in the drawer and what the roughest terrain you will be on. Some latches work better than others, some look better than others.
I have seen simple slide bolts used on some home brews. Very effective and cheap.
Southco makes a large selection of latches.
http://www.southco.com/en-us/product/hi ... l?hid=7318
Push & twist, pulls, locking, all plastic, marine grade, etc.
I would stay away rom the M1 pull to open. It looks nice but it vibrates open on washboards. (Page 154 of their catalog)
I replaced them with the M1 push to close-turn to open. (Page 155) They are much more secure.
I think the SMB standard is pretty much the Southco M1 Flush pull. (Page 151 of their catalog)