One thing you may not know is that it's quite a walk from Harrah's to the other casinos. So you might be stuck there--there's no shuttle or bus that I'm aware of (but you should ask). Harrah's gambling isn't as good as the rest of Laughlin--higher limits, tighter VP and slots. Their blackjack games are probably lousier than elsewhere in Laughlin--I know that the $5 games, for certain, are 6:5. Craps is probably the same as elsewhere, though with higher limits.
The best games and variety IMHO are at the Aquarius. The Riverside is a good low-roller joint (though a bit claustrophobic), and has the only other poker room besides Harrah's. The Tropicana also is low-roller--don't eat there, though. Food in Laughlin is generally pretty bad and not particularly cheap.
Meals and rooms at Harrah's are like at CET properties elsewhere: a) expensive and b) pretty good quality. My advice would be to only gamble enough to keep the offers coming and spend all your time golfing. Laughlin has nice courses, much cheaper than in Vegas, and the weather will be ideal.