Lakemont just re-did their food services last year I believe, and their food is good, but Delgrosso's is absolutely spectacular, and very reasonably priced. Lakemont's Skyliner may be the most under-rated coaster ever, it's solidly in my personal top 10 list. If you do decided to get the ride all day pass at Delgrosso's, you can save $5 by bringing in the label from a jar of their sauce.
I visited both parks last year, and I'll just tell you what I did, because I think it worked out really well. I got to lakemont around 1 PM and got the ride all day pass (though it was a Wednesday so it was only $3) and spent a few hours there. Got my LTD credit, did skyliner a few times, also did Toboggan and Sky Diver and a couple other little rides you don't see much any more. Then I went up to Delgrosso's to eat and get their wild mouse credit. Nothing else really appealed to me there, it was all newer stuff you can find anywhere, so I went back to Lakemont, did a round of mini golf, and then just rode Skyliner until they closed. Ended up with like 25 rides including 9 in a row without getting off.