Some farmers near here grow acres of tomatoes. They use determinate type tomatoes, and just let them sprawl on the ground. Yes, they haul truckloads of tomatoes off those fields.
I grow tomatoes the same way. Plant them, weed them once, water them and harvest tomatoes.
So, you can suit yourself and fuss around with the things, or just let them do their thing. Personally, I will let them do their thing and go fishing instead of fussing with them.
Whether your tomatoes rot on the ground as some say, may have a lot to do with variety, climate, ground conditions, and pests of all sizes. My suggestion is to try some staked and some sprawling. See what works for you.
You could lay down some newspaper then mulch with grass clippings.
This holds down the weeds and keeps them from lying diredtly on the soil.
I always plant twice as many as I need, and figure on some losses to critters both small and large. Always have plenty, and to spare.
Gardening at 5000 feet elevation, zone 4/5 Northern Utah, Frost free from May 25 to September 8 +/-