Self-tanning lotion won't do anything to protect you from sunburn. You'll need a really high SPF lotion even if you look like you're tanned (from the self-tanner).

I'd say it's up to you. If you like to tan, and would normally lay out, I'd go the tanning salon route to get a good base. You'll still need a high SPF, but it will at least offer you some protection. (Note: I'm not talking about the spray-on version the salons offer now, but the actual lay under the lights tan.)

I usually avoid the sun, so I go the self-tanner route. I like the Bare Essencuals version. It looks the most natural to me.

Have a great time, whatever you decide.

Kathy