Arcadia is the ONLY place to ride in RI. THe park has fire roads and singletrack all over the place. Some technical, some fast, all great. Still see it with my eyes closed. Get there soon. Don't confuse it with Acadia in Maine. It's ARCADIA!
A: Plenty of trails here where a CX bike will do well. Others where you will wreck or walk your bike. Between the fire roads and not too steep/bony singletrack, you can ride CX for multiple days here and the surrounding area without crossing your tracks once.