Hi Steve!
Where exactly are you going? Southern Marche (i.e. Ascoli Piceno, Sibillini area?), or near Ancona?
For the first solution, definitely worthwhile is Ascoli Piceno (I wrote a small article about it, I hope you'll find it useful:
http://www.angelorecchi.com/nuovo_bl...f-meletti.html)
If you'd like to visit Macerata, I'll definitely recommend Osteria dei Fiori, just behind the main square. It's the osteria where actors go to have dinner after acting. Therefore, you may happen to meet some "strange" people. The atmosphere is very relaxed and calm. Good first corses, and good wine. For the second corse, follow your instinct.
In case you happen to be around Ancona (what a pity, I'm not there this weekend, I was very happy to meet you!), go to Senigallia, which really deserves a visit. To sleep, I recommend Hotel Duchi della Rovere, the best in the area (tell them I talked to you about them, I think they can offer you a discount),
www.hotelduchidellarovere.it. To eat, simply go around the city centre, and find the place you like most. A good place to eat fish is "Il Cuoco di Bordo". Remind that Senigallia is worldwide known for fish. You can also have an appetizer at Anikò, the fishing kiosk.
In case you'd like to know some more, feel free to email me.
Ciao!
Angelo
ps: I'm not sure you won't encounter snow, at least in the Sibillini area.