Lithia Springs Campground and Recreation area.

Yes! I get between 3-5 bars. T-mobile works great here.

According to the Lithia Springs website they are open between April and October but there's an alert that a budget shortfall might keep it closed until May

Their general rule, if you have 1 camper you can also put up 3 tents, looking at the details online for the site itself, will tell you how many tents the site can reasonably accommodate

I am not sure, but it is a COE. Pretty sure it tells you in recreation.com app

Where are the cabins?

No.

Generally, if you contact the camp hosts that you are leaving early (by check-out time the day before), they will issue a refund. If you paid by credit or debit card, you will see a credit to your account fairly quickly. Cash refunds take longer. The key is to notify the camp hosts as quickly as possible, so they can post the site as available.

Did not see a subway near by, but wasn't looking for it either

When we were there last time it was later in the day like 4pm.

I do not know we stayed in the cabins

Check out recreation.gov

$18 a night for a site with electricity.

No

$18.00 electric; $24.00 full hookup

7, 8, 9, 22, 23, 25, 26, 27, 28, 29, 38, 39, 40, 45, 46, 47, 48, 68, 79, 80, 81, 82, 83, 84, 85, 86, 87, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109

Yes

At the marina only

Don't know. Was just driving through.

Usually it closes for the season in October