Yes Judy, there is a cell tower right by Aloha SP. And yes, given the conditions like a lot of rain which happened last year, it can get wet and muddy there as they have a low water table. I've only had one site that got really wet for me in all the times I have been there, hence one of the reasons I camp along the boat basin a lot. I have also driven through Straits State Park and am not impressed. I found the sites small, the road very narrow and it's also a bit overgrown. The sites that are on the water have trees and bushes between them and the water and are small. I might also throw out Burt Lake State Park as well, in Indian River just off I-75, 20 miles west of Aloha State Park. They have gravel parking pads but you can't camp close to the water due to the marshy ground there as well. It's a very popular park. Forgot to mention that those of you who have bikes, Aloha is right on the Northeast bike rail, a nice wide limestone packed trail running to the east side of the state, north to connect with the North Central to Mackinaw, etc. not that anybody wants to bike that far.
Keep in mind, that up here in early June we are just getting into spring. Trees are starting to leaf out and so forth. It can be cool. I would recommend waiting till about the 2nd week at earliest.