Basic advice for upcoming trip

Given the typical 6 deck game with about 70% penetration, what should a conservative bet spread be if i have a bankroll of $3000 and the related risk of ruin.

Back when I played in the 80's, there were single deck games only at the Horseshoe and the rules everywere were great by today's standard and one could win even with a 1-3 spread but these games are different and I am returning after a long long lay off. Your help would be needed.

I will be going to Tunica, MS soon.