Below is a list of forms you MAY need:

Tournament Player Guest Form:  http://www.msysa.org/pdf/gst11ply.pdf

Non-rostered Player Guest Form:  http://www.msysa.org/pdf/gst11reg.pdf

Medical Release Form:  http://www.msysa.org/pdf/meds2rel.pdf (notorization is NOT required)

USYS Application to Travel Form:  http://usyouthsoccer.org/downloads/national_office/travel.pdf

US Soccer Application to Travel Form:  http://images.ussoccer.com/Documents/cms/ussf/TRAVEL_APP_3-03.pdf