Indoor is a great time for coaches to get their kids focused on the "GAME" , just touching the ball in an indoor arena or a gym floor, better then home playing video games.
As a coach for last 10 years (this is my youngest child)I have found this to be the best for our team/teams,
1. if you are having a good year wins/losses wise, then play up 1 or 2 years, you will loose a bunch, but the kids will get the competition they need
2. if you are struggleing , play on age and hope for the best
3. play locally, there are enough indoor places to handle a team from your area, no one wants to drive around LI on a sat for a meaningless indoor league game.
4. large rostered teams, either split your team into 2 teams, divided evenly in talent, one wears home jersey other wears your away uniform, this way is costly but kids get alot of league soccer,
5. enter only one team in league , but split it into 2 teams giving the kids and their families some much needed time off
6. pepper your weekends with indoor gym, or other local tournaments , offer it to all the kids on your team, take first 8 who reply or make a rotation to keep it fair, do not bring more then 1 or 2 subs, most games are 10-20 mins long.
good luck