My suggestion is to play full ice hockey as soon as possible. I'm a big fan of spring hockey. Lots of spring teams out there with qualified coaches for red level players and they are done by the beginning of June. My personal opinion is to avoid summer except for a camp or two or a skating instructor. Most travel teams have more practice ice time/intensity that kids are used to and the season lengthens by 2 months (most travel team start practice around August 10th). I made the mistake with my son of doing the RMU crazy summer full ice 3x3 league that had no offside or icing and the Cranberry 4x4 league and a week long camp. The playoffs for summer ended 10 days before the new season started and he never got a chance to miss hockey.
Foxes switched to a birth year model for top teams but i'd be surprised if any of their minor year birth year teams make AA. For example the 07 Birthyear Foxes got beat 8-0 in their placement game for PeeWee and got moved down to A Major Black. Birth Year worked for the Renegades because they recruit from other programs to make the Vengeance teams. A good portion of the 08 birthyear team that won AA Squirts in their minor year last year were former Aviators, RMU Mite travel kids, ect. that all came together...Foxes don't really recruit that way.