Yes, the reservoir is open to the public (but you gotta pay to enter) year round. And keep in mind that the take-off strip is nearly twice is long as it was at our building. It should be significantly easier.
Also, in the summer months, the ground will be dry and hard and will can sweep or smooth the ground as best we can to make it less rough for take-off. But ultimately, it's advised to prepare for rough terrian when taking off.